I've been wanting this ability for a while. It sounds silly at first but there are many instances where I wish I could skip an individual character's attack. It's usually when the enemy is down to one and he's near death, and I want to go another round or two to be able to revive fallen characters, or heal up my team. Currently the only way to do something like this is to spend energy on an ability that does no damage to the enemy. This is a strategic ability that we should have the choice to make imho. It shouldn't be that hard to implement and it would bring more strategic thinking into the game.
Of course, the button should be smaller and off to the side somewhere where it can't be accidentally hit... maybe a confirmation dialogue comes up each time just to be safe?
Maybe this was already considered by the developers and they chose not to have this (as it would make things too easy) but it seems silly to me that we can't choose NOT to attack.
What do you think? Cast your vote above ^