I notice that numbers 4, 5, and 6 are not used. Perhaps some quick slots for things like shovels and fishing poles could be added in. Perhaps even food or liquid containers. Not that big a deal to me, personally, but it's one of the complaints I see on Steam - the UI. Being able to set things up to press a single button may help there. Maybe for specific skill actions as well - like tan skin (used for multiple steps usually with cooking in between so no easy repeat command) or make bandage/ make cord which would be handy after running into robbers...... Just something configurable.
Also, perhaps, the repeat command could maybe also auto use the last item for things that are applied - presuming it's still in the inventory (not a fox trap or snare).
- Shane