I will respond only to your first paragraph. The other two are not on topic to what I am talking about.
Every text of the New Testament differs from every other text, so the singling out of the TR is unwarranted except to counter a KJVO argument, and even then it is best to admit there are variants in all Greek Texts.
And as to being equal, let's move back to the Greek manuscripts for a moment. The primary foundation for the eclectic texts are, among others, Aleph and B, which differ from each other over 3000 times in the Gospels alone.
I don't find that at all troubling, but nevertheless, it is a fact.
As I said in my earlier post, there are over 30 TRs, all different. But all still representing (in their own flawed way) the Byzantine textform which I believe is most likely to represent the autographs.
When I got out of seminary I was using UBS 2, and understood the best methodology of textual criticism to be the "reasoned eclecticism" which has produced NA/USB. I have now reconsidered that opinion, largely though the writings and personal conversations with Dr. Maurice Robinson, and although I am a neophyte compared to him, I agree with his "reasoned transmissionalism" even though I am far far less knowledgeable than he. (He has forgotten more than I will ever know on the subject.) I wholeheartedly recommend his
The Greek New Testament for Beginning Readers: Byzantine Textform & Verb Parsing.
Well, I have rambled enough. Good night.