The team that was getting pushed back to their cap ship was ALREADY getting farmed. The only thing they did by sitting in the protection of the cap ship was prolong a lopsided match.
While I don't think this is a good long term fix, at least we can end those matches quicker. Also if I feel so inclined I can chase those gunships all the way back to their ship and finish them off without fear of the insta-death.
EDIT: They could extend the exhaustion area to the immediate area around the cap ship so the enemy can't sit behind where you spawn and shoot you from behind. That would be really annoying.
Anything that discourages Gunship stacking is a good thing. TDM+overpowered cap ship turrets=tons of cheese.