If you could pick only one thing out of other DAWs you’ve used, that you would want in Cubase what would it be. List in order of priority, highest first.
Logic: Floating Velocity Nodes
It would be great if Cubase had this as a different display option, much easier to see and edit chords.
Studio One: External FX/Send-Return Pipeline plugin
Cubase External FX Plugin definitely needs an update. I find Studio Ones to be a bit too tacky and over-designed for a stock utility plugin, makes its GUI seem dated. Keep it simple, sleek, flat.
-Waveform not necessary
-Studio Ones LED meters suck, make them accurate full range digital.
-Coming up with a dependable auto-gain compensation on the return would be great, see LetiMix GainMatch.
BitWig: MIDI and NoteFX plugins
MIDI effect production is underestimated and underutilized. Cubase needs updated GUIs and new additions.
ProTools: Multitrack Drum Time Correction/Stretching/Editing