I am not very creative, but sometimes, when i have too much time, i get nice ideas.
Sorry for my English, i'm not a native speaker.

First two new traps:
A fence against hogs, just 3 walls big. You can place them on walls and If they want to jump over it, 1-3 will be catched. You'll get one with th8 and then so on, because hogs got weaker many times in the past. Costs about 5000 gold and cant be upgraded.

A lightning rod. You can get one at th 7 and then one at every th level. It ist a hidden trap that can absorb lightning spells in a radius of 4 or 5, because these people who just lightening your dark Elixir Storage are pretty annoying. Costs about 15k up to 25k gold and also cant be upgraded.

Then, a new dark troop:
It is the opposite of the healer, maybe sou can call it "rager", but im not sure if you can say that in english. It is a flying troop with the same space needed as the healer and follows your army with raging shots that will work as a rage spell. Troop can be upgraded to level 4, just like the healer with the same stats. Costs about 250-450 dark elixir, in research 30-50k dark.

Maybe two new spells, but i think this ideas are too unrealistic:
A target spell like in Boom Beach, but not for so long time. It is a bit too strong i think, because so people can get your loot in easiest way.

And at least, a revival spell. It will revival all your dying troops in its radius for maybe about 3-6 seconds, so they wont die and came back with maybe about 20% of health points.

Let me know what sou think about this and respect that this is my first post in this forum! Have a nice evening!