Right now, we have a way to dump unwanted troops, even cc troops. Just go to any of the goblin mission and discard the unwanted troops there. It wont break your shield and you wont lose trophies. This is a pure dumping, with zero return of resources.
I like the idea that you could be reimbursed back some of the resource from unwanted troops and had posted a similar idea to this...
*digs the forum graveyard*
http://forum.supercell.net/showthrea...ster-X-3000%21
The way I presented the idea is a bit odd, just wanted to try something new back then...