I credit other creators, as I used their templates as a starting point. I've seen other creators use TGor as a reference for their appearances, to name one.
To further elaborate on the intricacies, I certainly did not just rip the templates. I started with them, and then applied my own work and research. By the time I had about fifty players made, I didn't even bother looking at any non-2K tendencies, as I found that most of them would have issues I wanted to avoid. That's not to say that there aren't people out there who far exceed me in that category, though. I absolutely plan on improving what I have, and further editing things to fit my aesthetic.
I don't get the accusation of "same roster" you keep repeating. I used some templates for some players, and edited from there. That doesn't mean I simply did a straight copy of a save. Yes, multiple people have their vision of an all time roster for each team. Yes, there will be overlap. But in the end, if enough time and effort and creativity is put forth, those rosters will have a distinct vision. I hope that I have been able to at least begin on crafting mine. If I have fallen short, so be it, but I want to keep improving.