So, with the Pirate Day coming, I think it would be neat to give our only pirate some love. In my opinion, he has only 1 reasonable skin at the moment (never saw minuteman in action and it looks bad in my eyes).

So I came up with those 2 possible skins:

Sea Wolf Gangplank
He would have an eyepatch on his glowing eye and glow would permeat the eyepatch making it look reddish. He would also have a hook arm instead of his sword and a wooden leg (his animation is kinda limpy so it would fit). He could also have a parrot on his shoulder.

Cursed Gangplank
Based on Davy Jones from Pirates of the Caribbean. He would have tentacles instead of his beard, a lobster claw instead of his sword, and a tentacle instead of his gun, so his Parrley and Raise Morale animations would be tentacle reaching outwards to his target.

Well, that's my suggestion.

Well, having seen both in action I have to disagree, the "Ghostly" (pale blue) skin is in my opinion one of the most boring and laziest skins you could do. The Minuteman on the other hand is such a refreshing change, it looks awesome. Anyway, I digress.

I agree with the main point of your post, that Gangplank should be acquiring extra skins, given the possibilities out there, but we shall have to see. +1 anyway