Rooms 2 has many great gadgets and props; we still are missing a lot though.
Here is a collaborative list of what gadgets and props should be added.
High Priority:
Mirror
All Vehicles (a customizable vehicle template -would be cool)
Costume Dummy
Desktop Sharing Screen
Paint Scope Rifle
Low Priority:
Microphone / Conference Microphone
Streaming Camera Point
Pool Table / Pool Cue
Campfire
Bucket
Custom Avatar Items Storefront Support
Some Kind of In-Game Circuit Graph
Feel free to add on to this document and check off any that get added in comments 