I've got some perfomances i use for different songs. I use slot one for clean, two for crunch and three for solo for example (i assume many of us do so).
So i can start with the clean, switch to the crunch, go back to clean and so on....
I first tap the rythm to set the tempo. Then, when i switch to crunch, the tap tempo is not the good one and when i come back on clean, it has been forgotten...
A cool stuff would be to "remind" the tempo between slots when you tap on it.
You change perfomance, it comes back to the saved one....