A Visitors Message Board: A player places a message board in the base that visitors can leave messages to that particular player. Character limitation Im sure. Too many times I come across a players base that either a] blows my mind what they created and wish to compliment them b] i take resources they are mining and want to thank them. That player can then build a message receiver board on their freighter or elsewhere in which they can read the messages and from whom.

Cages for all your companions: Either on the freighter or in a base, place cages that would house each of the companions. Can only have one follow you at a time, i guess. But you could interact with all of them on one place, rather than having to select each one from the menu.