I will add something from myself:
It would be cool if Akai adds in
Browse mode a back button in that blank space at the bottom.
Additionally, especially for MPC One users, the ability to customize the Content tab. Use "Shift + Tap" like folder icons in the top right corner.
Probably everyone would prefer to be able to link their own directory with samples OUTSIDE the internal memory (MPC One ~ 2GB):

In
Grid Mode, be able to delete the highlighted Midi Note with Shift + Copy (standard delete shortcut in MPC One, but doesn't work like that).
Currently, to delete a note, you need to select it, enlarge the screen, select the eraser, delete, shrink the screen, reselect the highlight option and move on to the next note.
Also in Grid Mode, the
magnifying glass icon in the lower left corner could move to the first note
from the bottom, and not only to the bottom, even when it is empty (it is always in the keygroup or plugin Mode).
I would like to be able to change in main options to have Song Mode instead of Next Seq.
In Main Mode, I would like the + and - keys to change tracks. I never use these keys because datawheel is more convenient. In Grid Mode, these keys could zoom in and out at the playhead location whatever tool you choose.
Change the function of hitting datawheel to "confirm" instead of clicking
Do It in multiple popups.
What should I write first, the
Autosave option should be running in the background!
Timing Correct
Selected Events should highlight the selected pad.

Now a bit about bugs:
MPC Software FX plugins and others are
incompatible with macOS Catalina.
MPC Software can clear the entire track when changing tracks etc. the same when working with plugins or multiple instances of a single plugin (eg Analog Lab)
It's better to do "bounce to audio" if you don't want to lose your settings, but then you close the door to changes.
That's why I only use
Standalone mode.
There is a huge problem with
Q-link knobs. I am not the only one who has such problems and they have already appeared in 2.7.2
Touch-sensitive function can freeze even when it is turned off (touch popup). Good thing you can save it and than reboot.
In my opinion, this sampler does not work well when cutting samples... Sometimes it can reboot and if you don't use the annoying autosave option, you lose several hours of your work.

Sometimes during chopping, when I accidentally change the sample, the whole "sample map" goes to **** and I have to chopping all over again.
And it is enough to touch the datawheel by accident, because by default it changes the sample when entering Sample Edit.
When working with Grid Edit with chopped samples and changing their places, they can become distorted or shift slightly. Of course, it can also freeze because you're working with samples.
Some examples. Here you can see how q-link touch sensitive works. You can see on the PC display which knobs are highlighted and which I am currently using:
Here is a classic q-link error. Fortunately, it can be saved:
Here is an error on the timeline when working with sample chops. Saving was not possible here.
On top of that, it's a really cool device.
But more like a toy, something like a mid-range keyboard. Plays music, it's fun at first, but when you go deeper, it's a lot of annoying things destroying the feeling during production.