Honestly? I think the feats Warren has her performing in her comic and the language he uses to describe them sort of undercuts how Galactus himself operates in a lot of stories. His real level of power is constantly under represented.
Like, fucking linear causality doesn't strictly apply to Galactus, but in most comics Big G is just treated like a giant purple man who sometimes does big energy blasts that we're told are much stronger than the flashy lights and big dumb energy blasts of the other cosmic characters, even when he was fucking at full power fighting the celestials.
Galacta in her book meanwhile discusses absolutely crazy shit like how she perceives reality, pseudo-omniscience, near instant travel between realms and throughout both time and the universe, and she's both woefully underpowered currently and implied to be much weaker than big G when at full power, logically speaking.
Warren treats her the way a lot of shit DESCRIBES but never SHOWS a lot of the other cosmic characters.