I also think polishing existing mechanics is a good way to go since I was a bit disappointed (not too much, just a bit, I still love everything else) with some mechanics in the new version.
For example 1: Getting an elk feels rather "gamey" at the moment, I wish that we could actually encounter elks (and other mounts like horses, camels (and especially donkeys)) in the wilderness and tame them.
and 2: Not a fan of the fact that the boats have no collisions and you can't walk around on them