Writing those voice lines also needs to be done with care, taking into account how often a player will hear those lines so they don’t become tiresome.
I swear, if I had a nickel for every f-bomb I heard during my 3 hours with Invinsible VS., I could retire right this second.
voice acting is pretty important for fighting games because you never know when that one specific line or grunt or something adjacent becomes a vocal tick that never leaves your mind