+1
What if you want an ending before it starts the new style rather than a hard change ? if you had an option to put a 4 bar ending before the new style this would come in handy along with more tracks and bar 2 bar re-gen(hopefully they are working on now), you could bring a new instrument/s in while the others are still ending.

That reminds me of Scenes from an Italian Restaurant changes at 1:44 then back at 6:00