TRAP IDEA: Spike Strip 2x1
Without doubt hogs are the major nuisance in Clash of Clans. When used correctly with the right spells a swarm of 30 hogs will decimate even legendary bases. I see that adding more spring traps, or giants bombs or new trap idea as the best way to balance out the hog menace.
Traps are only effective if placed strategically so even the addition of them is still left to chance. A 2x1 spike strip defence or two could be a suitable way to ensure well designed bases are performing as they should do.
Simple and potentially effective means of game balancing. Rock, paper, scissors.