Well, everyone knows zeroed players on the battle tab are an annoyance and the bt doesn't seem to refresh often enough to get rid of them, for example today there are two zeroed players on my bt and they have been there since this morning, close to 9 hours ago.
So I propose a "purge target" button which allows you to remove a target risk free but at a higher energy cost (so you probably wont be using it on every target you see since it's inefficient) compared to simply tapping a target off which isn't possible against zeroed players.
On a side note I wasn't sure what to place in the question mark section.
and I thought this seemed appropriate
http://memegenerator.net/instance/37198783