If anything, Lip's moveset potential is the best shot she has at avoiding the Mii costume consolation prize. As cool as it would have been to have K. Rool in there, the version of the character most people envision when they think of him (as in, King as opposed to Kaptain or Roolenstein) wouldn't make for a very unique moveset.
Remember, uniqueness of play style is one of the things that gets taken into consideration during the character design process. Lip's got a ton of potential that I hope Team Sakurai will be willing to take advantage of.