this is a request that origin from my work experience in Logic Pro x.
I would be able to insert a plugin between slots already used by other plugin without manually moving the inserted plugin for free the slot I need.
If you have the plugin on another channel just drag it to where you want it inserted. If not then no, don’t think there’s a way so still probably quicker to do it this way.
A related request: be able to reorder slots in the insert stack with drag and drop, including empty slots, which would let you easily open up a slot for a new insert.