Once there, you’re able to pop down buildings, shrubbery, animals, and decorations.
The blog also specifies the placement of “mossy rocks”.
No other types though.

Moss or piss off.
Here’s some grid snapping action.
“Each building & upgrade will also have a direct impact on gameplay,” the blog says.

The dojo trains combat allies.
The forge upgrades weapons.
A tea room lets you “increase ration efficiency”, and so on.
Nothing says excitement like upgrade names that evoke board room minutes.
It made sense for us to make them available inside of the Hideout."
This is purely speculation on my part, however.
I really love all the cool little moments they came up with.
It makes the Hideout feel like the beating heart of the league".