As it stands, Pyke doesn't come across as undead until he uses his W. All of his other abilities don't feel very undead either, and his voice filter could use a bit more tweaking. His skin tone is way too warm for us to believe he's dead, let alone drowned in the oceans. He needs to trade some of that warmth for cold blues and grays, and you can still keep his skin darker, just deaden it a bit. Overall he looks fantastic, but being a zombie pirate just isn't translating well as you have him in game.
His splash achieves this very well, as the blue tinge to everything makes us believe he's dead. Color him more along those lines.