Agreed with this one, but they aren't going to fix it.
At best they nerf the hell out of content.
If this was considered unacceptable by them they would have fixed it in the alpha/beta.
If they considered this important they would not have put the EU and the US in the same data centre in freaking Canada.
They didn't even bother with having the animation in sync with the cast.
Yes you,me and others might think the delays are horrible, but an equal amount of people think it's 'skill' to battle the lag.
Each their own fun I guess.
I don't think most people want to give this game a shot if they see this type of delay issues, it is also bad reputation.
But I doubt SE cares much about that anyway.