Why can't we have an undo button again?

[awpertunity]

Coding this is definitely not worth the work required. This would require an algorithm that checks to see if an undo should be available or not after every single action you take. I guess this could be done client side, but that exposes it to being more easily hacked and undoing any move you want. The algorithm would need to not only consider immediate FOV but something like bombshell splash damage letting you temporarily see something too.

There are so many things I would prefer time be spent on than this that I think would be easier to implement anyway. New maps? FOW replays? Wit counters on replays? Attack confirmations, and all special confirmations for that matter? Map vetoing/rotating league maps?