1) Can't judge this as I play solo or with friends.
2) yes! I would say, give us a plow to tile the ground and make the tiled ground act like a grid.
3) I would love to have husbandry in the game and/or make the animals tamable
4) I am so agreeing with this, small addition, make us able to "park" our horse. Maybe with a specialized horse pole thingy.
5) Yes and no. Mod support is a definitely yes but I also would like the game being able to stand on its own. Don;t pull a Bethesda and deliver a half game and suspect the mod community to fix it.