I am not sure the long-term implications.... but if we chew so that our cheeks aren't like this....
...then it seems reasonable that our cheeks won't get pushed out too much. Also, if the food is mostly in-between our teeth and less so hanging out in the cheek areas, then theorethically it may even widen our palates. Just tried it for one meal - and my jaws hurt a bit... though I think I look younger. It could that I've just been sitting in the hot tub too much and the heat is beautifying me or I'm burning some brain cells. LOL
I think any major changes can disrupt our balance. That is a concern.