Half second delay on actions in arena?

[Lumiaire]

I saw something that said arena servers aren't optimized very well for this game.

 

I was wondering if that is true and if that is why I seem get get a half second delay on abilities half the time I am in the arena.

 

It's getting kinda old when I hit a button see it go on cd and then just get my face wrecked for the next 20s.

 

Already know of a few people who have quit this game for this reason so I was wondering what the deal is.