I look at God's sovereignty and man's free will sort of like a chess match against a master chess player.
As his opponent, you are truly moving where you choose to move under available options. You cannot just move anywhere you want, but you always have some option until you are checkmated. In this sense you are free.
At the same time, a master player can control the game from start to finish. No matter where you freely choose to move, he knows how to counter your move to keep the game in his complete control. In the end he is going to win the game.
Now, the one difference between this game of chess and God is that God already knows the moves you are going to make through foreknowledge. This does not mean your moves are determined, only foreknown. Knowing your moves ahead of time allows God to be in perfect control at all times.
At the same time, you are truly moving freely within your available options, God is not making your choices for you.
So, God can be in complete control, while we have freedom, and both can be true.
OK, but the calvinist (or so it seems to me) backs up even further in time and says
If God Did not ultimately predetermine the individual's choice beforehand then He is not sovereign.
So now I will probably be accused of not understanding calvinism even after 10 years of reading the unending debates between C and A followers.
Personally, I will agree with your model until something better surfaces because the calvinist model ultimately (in my understanding) ends up with man as a robot.
So, on the one hand, God is not sovereign or on the other hand, man is a robot.
There seems to be no third hand - or perhaps some knowledge is missing similar to the model of the orange farmer that we don't know or maybe couldn't understand even if we were told.
For now, I like to use this scripture as a connection between the two (God's sovereignty and man's responsibility).
Isaiah 1:18 Come now, and let us reason together, saith the LORD: though your sins be as scarlet, they shall be as white as snow; though they be red like crimson, they shall be as wool.
Robots can neither sin nor have they the power of reason yet God is sovereign.
Yes, I know - straw man argument.
HankD