The delay between attack animations and their effect is my biggest gripe at the moment. I can't count the number of the times I've activated attunement (instant cast) and had a solid second or two of people still damaging me.

I also now instinctively wait 2~ seconds after I LoS a bard because I know a heavy shot will hit me well after I'm in cover and interrupt my casting. When I'm using pbaoes, like Miasma II, I've noticed I have to run ahead of the person's path to actually hit them, despite them visibly being in range when I cast it. The laggy feeling of combat in general is just awful.

The game definitely needs a dedicated solo queue as well. 3 stack players are just snowballing in wins at the moment until they collide with another 3 stack.

I also agree about the ranking system and map variety. The arena is far too simple in design to remain interesting for a good length of time.