Many MIDI devices send/receive high-resolution controller data by way of MSB + LSB MIDI CC pairs. Unfortunately, there’s no easy way to edit the data (in any DAW that I’m aware of), because the MSB and LSB MIDI Controller Lanes are always separated.
A convenient solution would be to offer a “link” or “combine” option in each CC Controller Lane of the Key Editor, etc. When two Controller Lanes are linked, they form one “super lane,” with the combined resolution of a standard pitch bend lane (so, not a lot of extra UI programming necessary). Cubase could then automatically separate the values into their respective MSB + LSB controllers on playback. Or, when the Controller Lanes are unlinked by the user, any recorded MIDI CC data could be automatically separated into their respective lanes.