Official comment
#1 - Again, won't be happening, sorry. The processing required for a non-sync waveform stretch is not possible in the RX.
#2 - It behaves this way because the CDJs operate in the same manner and Pioneer is maintaining consistency across hardware units.
#3 - The RX is not an HID device, as such there will be no support for LED illumination through software. The RX was not designed with the unit intended to be used as a controller (even though it features MIDI output).
#4 - This is a limitation at this level of product due to the database size and memory / processing capacity.
#5 - I'm not sure if this is possible or with an update, but would be nice to see.
#6 - Is on its way in an upcoming firmware upgrade. I promise!
#7 - Sorry, this is not possible due to the audio bus architecture.
#8 - Longer than 8 bar? That's 32 beats already!
#9 - The zoom levels are as zoomed + and - as they can go, sorry.
Your feedback is appreciated and noted, the engineers are always looking to make improvements or address problems and complaints.