Increase Health of Giants/Goblins at 4+ levels
From TH7 to TH8-9 Dragon Attacks is the only thing you see in wars. It's becoming so overused and predictable that wars end up being boring (which was supposed to be the fun part when you show your skills).
So I suggest increasing the health of lvl 4 to 7 Giants and Goblins. Maybe Barbarians too. Because leveling up your ground defences isn't neccesary anymore. Just upgrade your Air Defences, Archer Towers and Teslas and forget about Cannons and Mortars, they will only use dragons...