You still had people vocally complain about the DHC trick being removed. There's that 20-30% of players (thanks EH poll on Edition Select) who are going to fall into the super-self-centered/entitled camp and who just want to play as much BS as they possibly can.
A very very minor portion of the player base was against DHC glitch removal. A vast majority wanted it gone because they saw it for what it was... a bug used to inflate damage in a game where damage was already so inflated. The same thing would've happened to TAC infinite removal... some MarlinPie fanboys will cry because "oh noes we can't have swag infinites anymore" but most people will see it as a much better decision.
And yeah there is always that camp who want their broken shit because they want the easy wins. Hell people STILL want Dante's original Hammer back!
UMVC3 did have some complaints about some changes from more than a very minor playerbase. Off the top of my head these were changes that many people didn't like:
*She Hulk/Tron point nerfs. People knew the Tron assist nerf was coming but they nerfed her as a point character as well! She Hulk was pretty much gutted. I don't think anyone really liked these changes to these characters.
*Zero getting the Buster cancel. Everyone saw this as a potentially huge change to the character that could be game breaking (and will you look at that!). Zero was a fine character without this chance, he just needed his LL changed and maybe his scaling. Now he just has too much going for him.
*The HUD and character art in the main screen.
*The side TAC exchange removing meter. It was purely put in the game to screw over Phoenix. Quite frankly they didn't really "fix" the TACs like they said they would.
*The assists having decay hit stun. Made some assists really bad for combos and thus saw much less play. Even made some players change their team (MarlinPie from Magneto to Doom).
But by and large most of the changes in UMVC3 were for the better and approved. Game would've been so much worse if it was still in the Vanilla state.
This is not only about change... especially for Tekken. People pour their hearts out playing and improving that the skills they had would last a lifetime, kinda like playing guitar or drawing and painting. Would you want all those things that you practiced suddenly go to waste? It's not having a negative impact on their wins, it's about taking away the things that they enjoy on that game..
People put alot of coins and spent so much time for the things that they practiced, because they loved it. And then you removed that for the newbie that don't wanna put in the work? Yes, some people can deal with that for the sake of supporting the franchise, but then the game also becomes less enjoyable too! I mean, it's hard to go back to other wines if you tasted better ones..
Every franchise in existence has made changes. The good players always adapt. The fans always come back if the quality is good. Tekken is no exception either, changes have been made across every game and the people who always played learned to adapt. Should I go on a rant because they took away Jin's JFLS from Tekken 4?
For the record... there is NEVER going to be a Tekken game where you "don't put in the work" and get wins. Newbies are never going to be good if they don't put in the work... the only thing that can change is designing the game so that players are given more incentive to put in that work which is required to get good.