The problem with "Instant OFF GCD" abilities makes combat feel less rewarding.

[complexxL9]

You do not know when 2 seconds are over? Well.. Not gonna argue with that then.

You're lvl 50, you should kinda be used to when you can hit the button.
Also, I bet most ppl mash their buttons anyway, so there is also no need to look at the hotbar.

I should not be forced to get used to shitty mechanics. Either put on UI indicator when you can't use skills, or activate them when I push the button.
Who came up with this great idea that UI shows skills as available yet you can't use them. Animation cooldows are bad as they are, but what good is UI for, if you can't trust it? They should put 2 layer GCD animation if they are not going to change the mechanics itself.
But it looks like SE will let this issue "resolve" itself. Just wait long enough and all the unhappy people are gone - problem fixed.