I think they are doing it quite tastefully actually, and quite in-keeping with the theme of monkey island.
It looks like you will be able to interchange the graphics throughout the course of the game with the touch of a button too, as they are literally putting the original game as the basis and overlaying the touched up graphics on top.
So you could still play the original graphics, but with talkie.
I think it is a cool idea and a nice way to introduce the magic of monkey island to a new generation.
You're all just a bunch of foagies