They literally did a
Hijacked by Ganon on this sucker by making him Vergil. Everyone saw it coming but it was still mismanaged pretty terribly due to how completely irrelevant he is to the picture once he fuses back with Urizen. At that point he is literally just the same old Vergil with none of the personal character idiosyncrasies or development gained from actually being a weak human. I came to enjoy V as a character throughout the story, but a large majority of why DMC5's story just straight up did not work is almost entirely thanks to him and how the writers ostensibly used him as a trojan horse so they can relitigate the only villain anyone ever gave a shit about in this series.
It wouldn't have been half as bad if there was even any sign that V actually earned some form of development that transitioned into Vergil to justify why he's essentially Vegeta now. Half of the stuff V espouses about not being able to undo his sins and Vergil talking about whether he'd be in Dante's position if the two had their circumstances swapped as kids is completely empty platitudes when that doesn't actually lead to anything. V is a character that exists to build up to pure, yet hollow fanservice, and he deserved much better because as a personality I thought he was entertaining enough.
Game play wise though? No thanks. I like the idea of them wanting to make a character who can basically taunt while attacking, and I think he's novel every once in a while, but the way his attacks and mechanics work feel so intangible in a series that's revered primarily thanks to how extremely rock solid and tangible its mechanics are. I have no doubt that there's going to be some amazing DMC combo videos out there with him, but he's just not fun for me to put the effort into it. I especially did not care to play bosses with him.
When, if, DMC6 happens, I'd rather just go back to Nero and Dante (or an offspring thereof), having all of their levels designed around themselves and their abilities, with Bayonetta-styled bonus unlockable characters for added replay value. V can be a part of that.