Inspector GUI space is crucial, all cubase users spend a lot of time there, using cmd+option or ctrl-alt fold/unfold panel is very useful too but almost defeated by these fixed sized containers, my proposal is:
- When the container is empty: display only one slot (ready to accept one or more object such as an insert)
- When the container is not empty, only add at most one empty slot, ready for more …
Suggesting to please also consider mixer for smart sizing the insert, send and other containers.