1) Me and a friend came up with the idea of ditches, they are like walls but go down into the ground. And the attacking troops would need to get bridge builders/makers (couldn't think of a good name) to guild a bridge over the ditches to get into the base. It would be cool if someone could make an image or something to show what I mean but i'm not very arty or good at editing so... yeah. I have changed my mind a bit now from someone's reply, they could just be a trap and they would appear when a troops went over it and then if it was level 1 3 troops could fall in for 5 seconds or something like that. And then the more you upgraded them the more troops could fall in and the longer they would be in there for.
2) Another idea that a lot of people have had is Goblin King - like the barb king or archer queen but he just goes for loot like normal goblins
3) A Target Spell, this spell would make all troops within its radius attack what ever building you select. Excluding wall breakers. As shown below.
http://i59.tinypic.com/dwqeyc.png

