Let me put my 5 cents and say, why not a best of both worlds? Use the original face for the mc at the start and then have a really aggressive face transformations into the new style. This way you can preserve the early game feel of change while also allowing you to have a better looking transformations in the long run. I know that its going to take a really long time to make, but its up to you to decide if its worth it or not. I love your work and I cant wait to see what is up to come.