Holy ^&*!, delete it. How much dev time are you going to waste on an affix nobody wants? Wtf Blizzard!
As a sin Rogue, anything more than what explosives are currently on live, is a huge pain to take care of. I don't like the idea of having to dot up an explosive to kill it. Currently, I just quickly auto attack explosives and go back to my rotation on the adds. I usually end up #1 or #2 on explosive counts, and my dps doesn't suffer pretty much at all. Leave it as is. Healers just need to tell their dps to help or gtfo.
I tried explosieve on PTR yesterday as a DPS ( I main healer). I spent most of my time doing ST on explos . I know that for sure DPS will just ignore killing them on their burst etc...and they will let them explode so it will be a healer affix again no matter how it is This is the healer life we do the dirty job and dealing with affixes. Sorry to say that but the affixes are really not fun to play.