First of all, allow me to salute you for the Prime units - its a awesome set of equipment.
We have had our discussions, mainly because of the MCX8000.
But I do want what is best for Denon - not saying that I have the solution for everything but here are some ideas.
Communication:
It is critical that users are getting information about what is going on, so if only you once every other week could make a “status-announcement”, this would be very much appreciated from all I think.
Make this as a closed thread in the Forum News-area - this way we´ll always be able to see the latest announcement fra Denon. We all saw how important this was during the lack of information with the MCX8000.
And we see it again now with the 1.2 Prime update… people are having issues with the Hot Cue function and 2 days after launch, no one from Denon has adressed any of the posts. Just let us know if you have seen the issue, and what status is.
Updates:
I do know that codeing doesn´t happen like a “switch of a button”.
It takes time… None the less it´s better to make small updates more often, than letting your customers wait 8-10 months with the only information being: “It´s right around the corner”.
People tend to feel forgotten, gets frustrated and stop believing in the product/ brand.
Personally I would rather have 1 single thing updated once or twice a month, than no news at all for several months.
Take VDJ as an example - they are constantly making updates. And I do know that that is only software and yours might be a bit more complicated since its a peace of hardware where the software inside needs to work perfectly.
But still - a smaller update every 30 day (or so), keeps the doctor away… or something like that 
Vote for Features:
If possible, make a vote-function where people can vote on the features that are most important to them. Dont let us make the subjects for vote - Denon should list them they allready have heard about and if we need something else up to vote, we write you and you put it in.
Then allow people to vote on 5 or 10 subjects, and that way you can see what the majority wants, and can react to that much faster and make the list smaller.
One for SC5000, one for X1800, one for MCX8000 and one for Engine Prime.
I am so happy that i went from the MCX8000 and I finally have a stand-alone-setup that works. Thanks for the Prime set - best money I have spent on a setup so far!
Keep up the good work