Yeah a little bit, but that was inevitable when they made him the chief medical officer instead of a young lieutenant.
I... don't get the joke.
It doesn't matter when the decision was made, it was still a decision they made.
A choice, yes.
A change (your original word)... not necessarily. My point is that they created a character, and may have had the intention of making them the same character as TOS Kyle, or they just named him after that character. Unless they give some kind of hint that he is the same character (not much they could do to indicate so, I'd think), it's assumption on a viewer's part.