Guitar line col bass in One Last Drink? (I've done this twice, once with the Blattocaster and once with the Les Paul. I'm not sure what I think of this idea.)
Additional guitar line in Mouseverture? (That's been done. See post above.)
Add rhythm guitar for Jabberwocky (I added one but it needs to be done again. At least one more time).
Breath at top of Jabberwocky (taken care of).
Check flanging in vocal of Jabberwocky (that was probably a result of a poorly understood second vocal track I think this is fixed).