Here is something to study later when you have time. The gospel of Matthew and the Acts of the apostles both have 28 chapters and follows basically the same chapter and theological breakdown on major points. It is not coincidental that Jesus begins to speak of the mysteries of the kingdom of God during this age, a new age that begins with a planting and ends with a reaping, in Matt 13, and all this while he says that Israel is in a state of blindness and an unpardonable sin as a nation. Acts 13 is the distinct chapter where Paul receives his apostolic commission and begins his unique ministry to the gentiles.
While we are going to see correlation because Scripture is harmonious and consistent, we can't, in my view, draw an exact parallel as you suggest here. If you see it, I don't have a problem with it, so I am not saying you are wrong in your view. However, I try to draw correlations and identify distinctions as they are given.
Some do what you describe with the Judgments of Revelation, the Seal, Trumpet, and Vial/Bowl Judgments. They think they are the same judgments, but described differently.. It is the correlations they try to draw by which they seek to support their view. But it is the distinctions that deny their view is valid.
In regard to Acts, I see it as ultimately open-ended. Matthew comes to a dramatic conclusion, and ends with the Ascension, Christ's return to Heaven (which is what I would describe as "pivotal" in the vein of what you are saying).
So, for 12 chapters ending in Matt 12, Jesus has been preaching that the kingdom that was prophesied in all the OT prophets was now at hand and all they needed to do is to receive the King who was now in their midst. Matt 12 is obviously the ending of a growing season because Jesus said in that chapter that the fields were white unto harvest but the laborers were few and asked for prayer that he would send laborers into his harvest. Obviously the harvest time ended without the reaping of the harvest and the very next chapter we have Jesus speaking in parables and telling of a new planting season and how that crop would develop over the whole season until it was ready to harvest.
And here is a Dispensational standard I think might be lacking in your conclusions: there was no ability in men to "receive" Christ during His Ministry due to the fact that the Gospel was a Mystery and would not be revealed until Christ returned to Heaven and sent the Comforter.
At the end of Matthew, He returns. At the beginning of Acts He returns. Not many days after His Ascension He sends the Promised Spirit.
So the disciples being sent out is still a ministry to the Lost Sheep of Israel, not the beginning of a new planting or reaping. The "Gospel" the disciples preached was not the revealed Gospel of Christ, it was the veiled Gospel of Christ centering on the promised Kingdom of Old Testament Prophecy.
This is why Peter rejected the Gospel, despite hearing it from the Lord Himself:
Matthew 16:20-23 King James Version
20 Then charged he his disciples that they should tell no man that he was Jesus the Christ.
21 From that time forth began Jesus to shew unto his disciples, how that he must go unto Jerusalem, and suffer many things of the elders and chief priests and scribes, and be killed, and be raised again the third day.
22 Then Peter took him, and began to rebuke him, saying, Be it far from thee, Lord: this shall not be unto thee.
23 But he turned, and said unto Peter, Get thee behind me, Satan: thou art an offence unto me: for thou savourest not the things that be of God, but those that be of men.
Note that the Gospel of Christ is given them very late in His ministry, just before His death ("From that time forth...").
Note that Peter doesn't want this to happen. Not a moment of weakness in his faith, but a fact that The Faith had not yet come:
Galatians 3:23-25 King James Version
23 But before faith came, we were kept under the law, shut up unto the faith which should afterwards be revealed.
24 Wherefore the law was our schoolmaster to bring us unto Christ, that we might be justified by faith.
25 But after that faith is come, we are no longer under a schoolmaster.
All of Christ's Ministry was under the Law:
Galatians 4:4-6 King James Version
4 But when the fulness of the time was come, God sent forth his Son, made of a woman, made under the law,
5 To redeem them that were under the law, that we might receive the adoption of sons.
6 And because ye are sons, God hath sent forth the Spirit of his Son into your hearts, crying, Abba, Father.
The Dispensation (Administration) of the Gospel did not begin until He returned and sent the Comforter, who would begin convicting men of sin, righteousness, and judgment based on His "speaking of Christ:"
John 16:7-9
King James Version
7 Nevertheless I tell you the truth; It is expedient for you that I go away: for if I go not away, the Comforter will not come unto you; but if I depart, I will send him unto you.
8 And when he is come, he will reprove the world of sin, and of righteousness, and of judgment:
9 Of sin, because they believe not on me;
John 16:14 King James Version
14 He shall glorify me: for he shall receive of mine, and shall shew it unto you.
John 16:13
Howbeit when he, the Spirit of truth, is come, he will guide you into all truth: for he shall not speak of himself; but whatsoever he shall hear, that shall he speak: and he will shew you things to come.
So the disciples ministered the Gospel according to the revelation provided them at that time. It was revealed to them that Jesus was in fact the Messiah promised to come, and that He was the Son of God (and this is what the Lord forbids them to reveal in Matthew 16:20):
Matthew 16:13-18 King James Version
13 When Jesus came into the coasts of Caesarea Philippi, he asked his disciples, saying, Whom do men say that I the Son of man am?
14 And they said, Some say that thou art John the Baptist: some, Elias; and others, Jeremias, or one of the prophets.
15 He saith unto them, But whom say ye that I am?
16 And Simon Peter answered and said, Thou art the Christ, the Son of the living God.
17 And Jesus answered and said unto him, Blessed art thou, Simon Barjona: for flesh and blood hath not revealed it unto thee, but my Father which is in heaven.
18 And I say also unto thee, That thou art Peter, and upon this rock I will build my church; and the gates of hell shall not prevail against it.
This was divine revelation from the Father, but it did not nullify the fact the Gospel remained Mystery to them. Hence Peter's rejection of the Gospel of Jesus Christ.
We have to keep that in mind when we are looking for pivotal events.
Continued...