Definitely an idea I'd LOVE to incorporate! For the plugins I'm running with, I DO see potential in at least a character portrait for the status screen, and I'm currently figuring out how I can script it so that it dynamically changes according to the players chosen race and level of fullness
I'm working on my own rpgmmv project, so I might have an idea. maybe if you can change the size of the displayed portrait when, say, viewing the stat screen (or whenever you wanna see the full body), you could just have the portrait displayed there, just taking up more space. though, I'm not sure how to make it change dynamically without taking up loads of space with 5000 different actors just for the main character.