Feature request: Rack grouping, to edit/view groups of racks as a complete system on a single page (and ideally be able to edit the order/layout in which the racks are shown). This would be helpful for planning out multi-rack studios.
Right now I could open multiple browser windows and view multiple racks that way but there is no synchronization of module usage information that way, which is difficult for planning layouts where I want to ensure all of my owned modules are utilized but not accidentally placed twice across the whole system.
Currently I resort to creating one giant rack in MG to represent all of the separate physical cases, so that I can see module usage info for the system as a whole. This has its own limitations/frustrations however. For one thing, it constrains me to viewing everything in a vertical orientation, which is not efficient for screen real estate and annoying to keep scrolling up/down. There is additional frustration due to differeing case widths, since all rows have to be same width in MG. So I have to set the width based on my widest case, then add a bunch of blank panels for the other rows which is cumbersome and finnicky at times.
edit: On the topic of accurate module utilization tracking, it would be nice to be able to track quantities in my "collection". I own multiples of a lot of different modules, and right now I just keep track of that in my head or sometimes go do a physical count to double-check if I can't remember if I have 3 or 4 of something etc. Then when viewing/editing a rack/group, it would show something like "3 of 4" placed.