Feature where you buy a skin for heroes

Heroes have plain and simple skins, i was thinking if they could implant skins such as Halloween skins or Christmas etc.
they should have feature where they pay for skins 150 gems or something.
because the current use of gem is only builder huts and finishing stuff. so why not add new feature where you can decorate your own king and queen.

after all the king could have a Santa Claus skin and queen could have something like a sniper skin to make her look like she is in an army.