the ability to create a group node to transform multiple pieces of geo together.
also to be able to choose to transform from center of object or world.
keyshot does not remember the last import geo position if the scene is closed and reopened.
I took the liberty and modified the title of your post ;-)
@1. you can do this today. Select individually imported pieces in the scene tree, right click on them, and then select move object.
@2. understood
@3. I know - this one is on the list.