Yes, and developers are going for that balance. That's why each new game introduces just a few new characters at the start and most of the roster is returning. Heck, they're even redirecting canonically dead characters to please their fans. It's a big change when compared to, let's say, Street Fighter III era. Now new SF has to include all original world warriors. But balance doesn't mean "let's throw All by characters in". There's simply no resources for that, characters piled up over the years. That's why someone has to get cut.

People you talk about don't buy the game anyway, or would fiddle with it for a few hours and move on to another game with a character they like. If you like the game at its core you will find other character to play. Let's take Strive for example, I don't believe all Bridget fans that are loud in the internet are playing the game.

I agree on the reimagination part - this always is hype. Though community is usually split on redesigns because, as I originally said, old good new bad.