There's nothing wrong with any of those artists, certainly; they're all very talented illustrators. But I'm betting that anything that's more designerly in nature will be glossed over. This kind of stuff...

There's nothing that makes one approach better than the other, but the painted pieces have more flash, and tend to be less subtle in showcasing their creators' skills. And I won't be at all surprised to see people responding more to that than to a more nuanced approach.