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Better CC deployment
I think that supercell should re-do clan castle deployment. We all hate it when we place the clan castle and they all spawn in one spot. This means they are vaulnerable to a quick death. Archers can all bunch up and be one-shoted by mortars and a dragon could easily take out a squad of troops with one fire breath. This new clan castle will fix this.
When you tap the clan castle icon it will bring up a new troop deployment menu (like the one at the bottom at the screen while you attack). This new one could be stacked on the other one but it doesn't matter. This will enable you to place clan castle troops wherever you want whenever you want. It would also make it so if you need only a few troops you don't have to waste an entire clan castle.
I hope that supercell considers this and maybe implies it to the game. I didn't find anything on this subject so I hope it's not already ruled out.