On U4 trello I saw animals may be able to be tamed and used to ride or possible fight for you. If that is the case I would love to see the ability to craft a wagon and attach to a horse to be able to carry large loads. Maybe 1 horse for a tiny Gandalf style wagon or if your lucky to find 2 horses a larger wagon that could haul more weight.
Would be useful for early game before you get access to cars and want to transport goods, haul raid loot, or simply farm up.