I’m willing to bet that the baker’s dozen I’ve highlighted here are most if not all on regular players’ worst 6*’s in the game list.
Many of them aren’t remotely fun to play in addition to being ineffective and, in some cases, irrelevant.
My humble request (before this post gets relegated to that dead letter office called “Suggestions and Requests”) is that any subsequent buffs be directed at this motley crew of losers. It’s still a significant moment for about 99.99% of the player base to open a 6*, and when one of these lunkers rolls out...well, the game team plays MCOC so they know how it feels.

Suggestions? Here are a few do’s:
(1) Buff via synergies
(2) Buff like Gamora, without fanfare or beta
(3) Make then fun to play even if not super “effective” (an example would be RR, whose Sp2 I still enjoy dropping 4 years later)
And a few don’ts:
(1) Don’t improve them via synergies that require obtaining a new release champ
(2) Don’t make them best in game, just useful
(3) Don’t release a new version of them that has bells and whistles without throwing them a decent bone someway (shhh, OG Carol Danvers...maybe you’ll get some love when CM2 comes out)
Some other hyper-wordy forums member can probably add more criteria to mine, but the gist should be the same: don’t let any champ in the 6* be rubbish.
Dr. Zola