Flashing hot cues
There are some people who do use hot cues, and I have an XP1, so I have 16 on each side.
9 times out of ten, I only use a few per song, but they're there and I'd possibly use the a little more if they flashed.
What I'm suggesting is flash the next hot cue in the track, when it's passed, move on to the next hot cue and make it flash, and so on. It's just a visual that lets you know what hot cue is next and you'll get a little idea of where you are in the cue list.
No big deal either way, but implimentation should be both easy, useful and it should work seamlessly across all DDJ devices without too much effort.
I've lived my life without it, so I won't miss out.