I have several suggestions, concerning 1.6:
1 - CRAFTING: after crafting one item all chosen parts should NOT go back do default ones. Sometimes we make a lot of the same (usually cheap in materials, but giving lot of XP) weapons. And constant re-selecting parts is annoying
2 - CRAFTING: option to SAVE certain set of parts as a player-made template, which would eliminate the need of re-selecting all parts everytime we enter smithy
3 - MAIN QUEST: time limit should be optional (some players like it some want to play w/o a time-stress)
4 - TIME: maybe it would be better to make an in-game year last for 365 days? Seasons of the year would be longer but it would be more intuitive when looking on save 'days'.
5 - TIME: It would be nice if in the world map, there would be displayed number of days passed since the start.
6 - PERFORMANCE: in 1.5.8 fps was cool, after 1.5.9 it was horrific. In 1.5.10 and 1.6.0 - is better but still :/