What do you guys think about seperate controls for Speed/Pitch on Djay ios, and Set start/stop times for each track?

Seperate sliders for Pitch, and Speed Control.
As well as a way to set start/stop times for each track.
Example- When Bangarang (Track 1) gets to 3:28, then Call Me Maybe (Track 2) Launches at beginning OR at 0:13 Sec.
What you think of it?
i think it would be great, and would be a great help in ‘Fine Tuning’ those two tracks that seem like they should work, but you just cant get them to both launch at the right time in the right place.