I think some people overestimated the strength of the gems.
There’s supposedly at least a hundred gems in the game, or maybe they just have a three digit counter for no reason.
Anyway, some of these damage gems don’t proc off as properly as you like. These gems are basically multiplicatively added from what I’ve seen so far and they scale pretty hard if you do chains a lot and almost make not much of an impact.
The most basic ones on launch are: Connect 5 normals, connect 10 normals, hit 3 specials, get hit by 2 specials, perform a tag cancel, perform a launcher, your partner does a launcher, go into pandora, and whatever else. Most of these are based on in game timers. I’ve gotten some beefy 40-45% combos with damage gems on in training mode, but connecting them in a real match is pretty random at best since I can’t deliberately always manage to nail someone with a punish that cleanly.
I think early on people will fall for a lot of gimmicks like not knowing what overheads or goes low off the bat. That and grapplers with slow command grabs. I think they will fall off after the first two or three weeks. But I think everything will still be really fun.