Mini Crossfader for Pre-Cueing [djay for iPad]

Hey guys,
I am using djay for iPad with an AIODJ cable for split-output.
the single buttons for pre-cueing aren ́t that good. Can you implement one mini crossfader for the pre-cue-output (like Reloop puts them in hardware in their IQ.2 series)?

Alternatively it would be nice if the pre-cue buttons per channel don ́t activate & deactivate on moving the main crossfader.