I noticed at the Christchurch NZ world tour event yesterday that there is concern over hidden connections - wondering if they could show a popup when you hover over them advertising which transformer they go to/come from, and maybe even an option to zoom to it. I know there are tunnels that do this, but thought I'd suggest in case it has not been already!
A good use for these can be hiding connections that cross bookmarks (getting in the way of other transformers etc.), to clean up those bookmarks.
Also, can you un-hide at one click?