Abuses can be prevented by making the self-destruct ability a consumable. It can be made expensive enough that griefers would only bankrupt themselves blowing up their own team.
It should have the same 5s countdown with the rest of the consumables (4s for premium and upgraded version). At end of the countdown, the mech explode, doing large amount of damage. However, If the mech casting it is killed during this time, it should explode immediately. The consumable is lost if the countdown is canceled by powering down.
Also the self destruct should not be usable by light mechs.
It should give players something to do if their mech get completely crippled and/or surrounded.
Edited by Torafugu, 26 October 2013 - 10:36 AM.