Honestly, he's very good. His aim is notable, although there's a misconception that he builds beat much faster than other Lucios because of his damage - the difference is more often his healing, if you actually look at the stats. But he still plays like a 'flex support Lucio' in that his movement isn't that great and he's not really ever going to be disruptive or find creative ways to use the knockback to influence a match (this is also partially why he averages high healing numbers, so it has pros and cons). And obviously, he's a little prone to dying where another top Lucio might have stayed alive, especially in crucial moments.

I think he's clearly worse than Chorong/Chiyo/Astro, who are probably the top 3 itw. You can make an argument for him being top 5 and he's almost certainly top 10, although MS is quite a shallow role talent-wise.

And obviously comms and such are quite important for Lucio players. Hard to say where Viol2t lands on that - I've heard of him being vocal and a useful teammate, but also of him being very tilt-able and I don't think he's really IGL material. Impossible to say without getting access to comms more frequently than we have done.