Yep, Josh...getting stranger by the moment - I took up guitar 2 years ago (my C-G change is causing me a fair amount of grief as my fingers don't want to listen to my brain). I found that playing also helped with the mobility in my wrist, which is totally back to normal. My voice is slightly lower than before and I have some issues with higher notes, but all in all not too bad. I'm practicing hard as I have a performance in 10 months at a charity event.
I found the same with singing, as they syllables (especially "s") meld into one another so the enunciation is a bit easier.
They took a bit more than half of my tongue, so I needed the graft. I told the surgeon to make sure they lasered it as I didn't want to feel like I had a hair in my mouth all the time, lol!
For PT at home, I found that lying flat on a bed and using a pole or broom handle over my head was one of the more helpful exercises - it also stretches out the back from general poor posture from overcompensating on the right side.
Love your dog, by the way - he's beautiful.