I have a level 50 marauder with 400 expertise, after getting rolled by Ops by being knocked down and then critted for all my hp before I stand up I decided to reroll an Op..
My Op is 48 now and has 0 expertise and any Op on this forum who is saying they aren't op are delusional.. It is EZ mode compared to my marauder I just have way too many skills packed into 1 kit.
I have no doubt they will be nerfed... if they fixed the ability delay **** I would steamroll even harder then I do now which is crazy scarey to think about