Given that I spend most/all of my time on the computer during the night, a built-in dark mode is still at the top of my list.
But I would also like some improvements in the pixel editor:
I would love to have some of the same shortcuts/conveniences that are in Gimp.
* Middle click and drag moves the view point of the work area around (this would be best for when zoomed in) so for example if you click and drag right the view area would move left.
* As someone said, I would love a variable zoom, both with a slider for laptop users, and actuated with the mouse wheel.
* I would also love it if there was a button to export the bitmap as a png with palette translation, as I find in some cases where I'm using my stuff in other tools, I have to spend a fair amount of time changing colors.
With all that taken into consideration, I find myself having to use a fair amount of external tools due to them being more convenient.
However the pixel editor has things that other tools don't, i.e. 1x1, 8x8, and 16x16 gridlines, so I always find myself coming back to the pixel editor for those features.