I think polymorph, haste, and slow still misbehave.

I prefer tutu, and never used the walking speeds tweak. The only components I ever used with Tutufix were "balanced totemic summons" and "ammo stacks like BG2".

G3 has a beta walking speeds in their tweak pack, you might want to check that out to see if they've made progress. They may have just adapted the code from tutufix, idk.