I mix different genres of music and sometimes when i go from a slower genre to a faster one, I always think it would be good if there was a setting to make the tempo go from a slow speed (say 90bpm) to a drastically faster speed (say 130) at the touch of a button without having to manually drag the tempo slider from top to bottom. You could have a drop down button from the tempo slider preset which bpm you would like to speed up to and at what time scale (like 1 minute or 4/8 or 16 bars)
Thanks for posting your idea.