This is such a disingenuous comparison it’s laughable.
Sonic is an exceptional player, but it’s clear they’re not super comfortable/optimal with Li Mei yet as evidenced by the numerous combo drops, the random fatal combos that don’t work, and the suboptimal combo routes. In any case, the combos they actually complete are still mostly 30+, and they do not go for anywhere near optimal, or max damage. That’s fine, Sonic’s fundamentals are so good they can win by doing basic shit - but to look at this video and then state that Li Mei has bad damage is disingenuous at best, and lying at worst. Ask sonicfox what they think about Li Mei’s damage.
Ex db3 with khameleon is situational, I will give you that. It’s still an option that no other character has. With scorpion it’s much more consistent.sonic does use it @17:59
Sonic doesn’t use iadb4 much at all, but the only time they do, it hits (@5:17).
You can downplay all you want, but if you’re gonna do it, probably shouldn’t link the evidence that proves you’re wrong?
If you want to see some Li Mei/Khameleon game ply, I’d suggest looking up Ghener.
For example:
02:20 - 4:27