It's a waste of time. Every once in a while when I have 3x Lightning cooked for a war attack, I will go down the list to see if there is anyone with DE worth zapping. That's about all revenge is good for. As a maxed TH7 I get attacked mostly by high TH8s so it's not worth trying a normal attack anyways. If you spend a bunch of time trying to revenge someone you will just get frustrated.
I think the only way it could change would be to make PvP more like war, where each player gets an attack and instead of taking each other's loot you are competing for a win prize.

