It would be great if we could cross-feed out troops to level them. Much like the majority of us do with our heroes. Obviously feeding a red troop to a green troop wouldn’t be as effective as feeding a green to a green, but, sometimes all you need to finish maxing a troop is a small amount. Give it the same 16% penalty as off-color hero leveling.
I like this idea. It would help to balance out the strengths between the colors. My weak color is red, I rarely get them. Would love to feed them greens, where I have them in abundance