Hi. I don't think this exists already (does it??), but it would be good if, as in real-world aviation, the pilot/user were able to request a specific change in altitude (especially when reaching ToD and the pilot wants to descend there and then), which is not linked to clouds or turbulence, as it is at present.
I was imagining something along the lines of there being a hotkey to request ascent or descent, as now, but PF3 then waiting for a number input from 1-9, so entering '6' for example would lead to ATC granting a change of altitude of 6000' ("Speedbird 100, descend to flight level 300" - if you were at 36,000'), up or down depending on the first hotkey input of course.
Or simply as it is now, but minus the 'excuse' of clouds/turbulence: the option to disable 'unable at this time' would be useful too: some a/c don't properly recover their FMC profile if you delay descent at ToD - you can end up way too high for the G/S).
Just a tweak of what is already there, I suppose.
Thanks.