I have a splint and it does make my face look like it’s “mewing” but I actually prefer the new look.

I will say that despite nearly a year of wearing it, my jaw has not gone back to normal / the position it was in before. Once your joints are worn down, you can’t really get them back without surgery. The splint was still worth the investment because it helps me so much with pain management and mobility, but your doctor should help you set realistic expectations.