Collections working as a linked object

Collections are a fine adition to the new blender workflow. However there is still room for improvement.

It should be nice to select a collection and automatically select all inside it, and you could grab and change its position, rotation or scale as with there where linked.

Since I can't put object inside object now at the outliner, this will solve this issue too.

This would help alot when creating a massive scene with multiple objects and a alot of instances of the same object too.