That’s a great one, count me in. 
As for the Denon hardware:
- Overall very lovely, very capable, I am glad to be on board
- For my Denon Prime 4 ‘MK2’ ideas, look here
- Please add AUX-CUE/PFL for the SC Live 4 (quick menu) like the P2 has (button), mixing in a backup phone or Akai MPC/Force via Ableton Link is mostly useless without pre-listening
- Sturdier upfaders and Play/Pause buttons (like the SC6000 has) for all future devices
- Keep on improving the high end roll-off, and even more, the EFX quality
- For the next hardware iteration, double the RAM and use stronger chips than the RK3288
- Don’t go “too subtle” in the design, e.g. I miss the silver feet of the SC5000/P4, they look dope
- VU meters should stay conservative: green-yellow-red
- Separate VU channel meters for the Prime Go (as stated above)
- Sampler Mode
- Hard reboot with complete audio cut-off to switch between Standalone and Serato/VDJ is unacceptable in 2022
- Reduce price fluctuations (see SC5000 history, or the SC Live 2/4 release). Price reductions are always welcomed, but they should be implemented more smoothly
As for the Denon software:
- Mostly fine so far, you did great improvements over the last 3 years
- Try to focus more on the major user requests in the forum
- Make your Desktop software more powerful (Smart Crates, Relocate…)
- Always test thoroughly on all devices & scenarios before a release
- Consider a DJ-/performance-mode to add more flexibility
As for SoundSwitch (extra thread[s] will follow):
- This is a new area for me, but I already learned a lot
- Thanks so far to the support (Liam), highly appreciated
- User interface is quite clunky for large amounts of (sub)fixtures / multicells / pixels
- Vertical scrolling needs to get improved! Add an option to zoom/in out vertically as well i.e. make the individual fixture tracks smaller, they take up too much vertical space, especially multicell ones
- When highlighting/selecting an area, the current # of selected beats should be displayed
- The bottom beat markers should offer an alternative display option with 0…16…32…48…64… rather than 1…17…33…49…65… (which is harder to grasp)
- Allow fixtures to be rearranged in the track editor (already has been promised)
- Allow fixture folders within folders (to make grouping and master-chases easier)
- Allow easier copy-pasting of created patterns into other fixture tracks
- Allow to create and save custom chases and color palettes effects
- Move “Display Main track visualizer” from the settings to “View” for faster access
- Add a more sophisticated visualizer, at least for static RGB fixtures (pars/washes/strobes)
- More customization in the left library/effect/position area. For example, I will never use moving heads and always have to close the position area. The music track area takes too much space too. I would like to display many more effects and chases at once instead. → Make the sub-areas resizable and remember the settings for each project.
- Several bugs discovered on day one (can’t rename some fixtures in the arranger window but can do in the DMX matrix view; can’t change multiple colors for LED stripe at once in the static looks menu, main track visualizer window vanishes sometimes…)