I'd like to see a fine tuner implemented in the transpose effect to help jamming along to tracks that aren't in exact 440 or are not dead on say B standard. Examples of this would be say Van Halen 1.
I think maybe a fine tuner control of say a range of around +/- 250 cents will probably be enough for most.
So you could set Transpose to -1 then dial it down another 25 cents or whatever with another control in the menu.
A lot easier than retuning your floating trem by 10 cents or so for a quick minute of two going over a riff.