Watching video, holding opinions atm... will edit.
Wow he has been toned down hard.
His aesthetics are no longer about lightning fast attacks. Lost a few attacks but he got a few new ones.
Looks like he has a passive ability to dash after hitting with attacks, perfectly timing gets him dashing faster.
Not sure I like how he turned out right now, my favorite move was cut and he lost quite a few HP attacks.
BTW Sephiroth is popular because FF7. Yes, he is a very powerful person but his power and character is not why he is popular imo (people use that as an excuse nowadays, he is awful as a character). He never expresses any emotion beyond slight joy and slight sadness, even when not polygonal and voice acted. Very monotone, unemotional to a fault, his power is all he really is as a character. As a Dissidia charcater he really looks dull now, especially with his cut Brave Attacks, let alone his Meteor and rapid slash HP attacks (and Sin Harvest and EX Mode).
How is his character awful? it's not incredibly great but if you want to destroy the world for someone else (Jenova) with psychological issues to boot, that is a good villain. It's not on Kefka's level of insanity but he is rather insane. You do evil things for ridiculous things but somehow retain some intelligence about it, yet you still want to do it anyway without a true legitimate reason? that is a ridiculous villain on higher notch. Monotone? absolutely, possibly one of the few things that I dislike about him along with the messiah-god complex and listening to someone that isn't his real mother. It's cringeful at it's finest.
As for popularity, I'm positively sure majority of it was power related. Have you seen GameFAQS and FF forums with Sephiroth topics on vs X character topics for over 600 pages? even his character design is what drew people in. FF7 was the reason for that and the peak of attraction from the viewers as a mass when he burned Nibelheim (CG scene)
For Dissidia back then, his Octaslash carried him with specifics and BRV accumulation as well as splatting them for walls. He wasn't exactly top quality in vanilla and 012 since he was pretty dull on those games too.
SE may have designed him but Disney owns the rights to kingdom hearts.
People are asking for "Sora".
"One" character.
They are not asking for Disney characters. All righted material from company development belongs to them.
"Sora" belongs to "Square Enix."
Disney does not completely own Kingdom Hearts. It's co-developed and funded help by them, but they do not own the game. They have rights to it because Disney characters are in it along with story-plot influenced, but more heavily to Square Enix in terms of who gets to decide who gets in that are
not Disney characters. It is a collaboration between
Square Enix and
Disney Interactive Studios and is under the direction of Tetsuya Nomura. Kingdom Hearts is a crossover of various Disney settings based in a universe made specifically for the series. - Copy and pasted. You are welcome.
https://en.wikipedia.org/wiki/Kingdom_Hearts
Also Sora is announced as upcoming WoFF content. Again, owned by Square Enix. People are not asking for Donald, Goofy, Herc, Hades, Mulan, Mushu etc etc etc. They are asking for..............Sora........made......by Square.