Honestly, even if auto-dump organized the hotbar more like what you see on the K screen, that would be huge. So, for magic users, cantrips, then Level 1, then 2, etc. For fighters, Second wind then Action Surge then Menacing Attack. Just put them in some sensible order so with Rogue I'm not clicking the next menu down to find offhand attack because spell scrolls, potions, etc. got auto dumped on the list taking up the first 12 slots on the hotbar.

If you're going to auto dump, at least have it make sense.