Due to neuro-visual disorders the poor contrast in Experience Builder makes it impossible to use. The layout is also too crowded on a laptop screen. Because I can't use a screen bigger than a laptop the Experience Builder main window gets lost in all the tools.
I want to suggest the ability to switch to light theme. Also, I recommend changing the contrast for dark theme to a white on dark background.
The UI should also have more customization tools to make it accessible for the user such as changing the size of icons, move windows, create a more minimalistic interface to ease fatigue and see every element better.
I am aware that an express option is coming. This is something I always turn off in instant apps because I don't know what is hiding and want more control.