You can do this on a per layer level. How many Layers do you have? Some of my installs have 12-18 layers, so it takes a min to go through and trigger first clip on comp load, but it works like a charm.
If you're using a MIDI controller you can map a certain BPM value to a button. So if you need 127 you can hit a button to take you to 127 and then another button to take you to something like 140 if needed.
That would need to be done on the Clip or the Layer level transform control. Add the Slice Transform and then adjust the scaling to make it look how you prefer.
Yeah, your biggest issue then (with any application) is going to be normalizing ALL of the tracks played. If you can route your audio through a compressor and gate on a side chain and have that aux sent to the application, that will keep you from having to "fine tune" each song, while the ...