No but seriously, mahito and megumi are the only ones with this and they not only feel great to use but are super cool to fight. 

Whenever i use my regular ult against either one i feel the power difference and it makes it feel like your an underdog WHILE using ult which is genuinely so hype. also since they need requirements to achieve they feel even more exhilerating ( especially mahito).

Obviously som characters ults are on the level of super ults like jackpot and mech ( even naoya). but then theres so many wasted opportunities (naoya is widely agreed upon to be the biggest example of missed second ult potential).

Idk i just think that characters who have shown the required feats for super ults should get them. (naoya regular ult should be what he showed in his fight against maki, todo vibra slap ( it might just be a diff character) , yuta with you know what, mecha (he can have atleast a puppet army variant), nanami potentially with malesia, ryu could have a regular before overheat variant where he as incredible fire power like in the show etc).  

a few of these are a stretch sure and prob dont need it, but with so many who have the megumi to get super ult you think they would add a few (cough naoya) . It also worries me for future characters who could have them and wont end up getting them ( kashimo, jogo, kenjaku). 

Why the devs against adding more super ults