More focus on making the basics faster and easier for beginners!
e.g.:
interactive/visual tolerance adjustment to some tools: finding the right tolerance/sensitivity is sometime very slow and annoying. E.g. adjusting in real time the flood select tolerance and seeing the selection adjust (based on the previously selected point) would make life much easier!
larger icons in the toolbar!
background/foreground selection: this is by far the most common task for beginners and the most frustrating one. Having some kind of wizard (like focus selection from CC or the ML from remove.bg) would make life way easier!