I suggest we loosen the requirements to be if the enemy dies after being on your base within 10 seconds, you are rewarded a defensive kill bonus. Sacrificing for your team to save your base isn't all that glamorous. We need to do more to reward selfless players.
I'm unsure how this reward works in Conquest, but if it's problematic, you could make the improved version Assault mode only.
Edited by Jman5, 15 November 2013 - 10:48 AM.