Can you make it so you can undo a room in the first minute or something cause i accidentally put a stimpak room with my rad away room and i barely get any of my caps back when i destroy it.

Or make it so you can swap rooms with eachother but you cant fully refund anything. (more specifically rooms that are the same type, for exaple swap places of a stimpak room with a radaway room, or swap places with restaurant and water treatment rooms)

The idea of a full refund the first minute is OK (many games have this behavior if you missclick).

About swapping rooms... It could be done, but with several limitations:

1-. Both rooms must have the same size (you cannot swap a 3-size room with a 1 size room;) they don't need to be at the same upgrade level.

2-. The swapping WILL take time. The larger and more upgraded rooms are, the longer it will take to relocate all the equipment. Also, dwellers must be asigned to do the swapping.

Finally, another option about rooms should be to allow destruction of a room as long as linked rooms do not get isolated from the rest of the vault (once you build the secondary elevator).