The recent change making big bombs 1.5x against hogs is too much. As an alternate have walls at level 10 and 11 do damage to anything jumping over them from the fire or electricity. take the bombs back to where they were.
This would encourage players to upgrade walls, which are ignored by many, and still at least weaken the hog attack while still requiring some skill to execute. you would at least have the chance to try and heal hogs. Today there is no chance to heal hogs if they run into a double bomb