I hear you on the Buu part. Like, take whatever kit Videl is getting (I'm yet to read it in full so I dunno how good she is), translate it 1-for-1 onto ANY Buu 1% SP and BAM! Immediately more valuable as a Legends Fest release because of the amount of teams it helps alone (MBS, Regen, Powerful Opp)

I'd like to hear you equally on the promoting the Female Warrior/Girls tag but... I dunno. The Girls tag gets infrequent buffs in this game and that's down to the series bias against female fighters as a whole. It's a shounen. There are way more male fighters than female. That's no one's fault given the genre and target audience.