More romance-able NPCs... Poor, poor Sandy! Sad, sad Clint!
Then, less illogical and abstract help quests. Some sentences are downright hilarious, out of context and make no sense at all (rub on knees x item, ask first season days for a crop which needs days to grow etc).
Trees on your farm to stop spreading seeds, if you surround them with flooring/walking path (my design doesn't include 2 or even 3 layers of the stuff, i need to construct 1 only).
Heavy Tappers to be sold for Qi gems. I do not even want to remember what hellish chinese farming sessions i went through, in order to equip one, on 140 trees!
All rare items (especially decorative ones), once acquired, to be sold from vendors/sources later (much like crystal chair and rarecrows). Similarly, clothes. In my previous save i trashed Work Boots, thinking i would find them again, due to lack of inventory space; it would be nice for Guild to sell them, post me acquiring them once...
Hoppers to not occupy one item spot, but be fused with the machine, exactly as enrichers/pressure nozzles do with sprinklers.
More gifts. 2 per week could be 1 per day.