I'm kind a rig messie, because I have more than 1,1K rigs on it. But I still am able to find my rigs fast and have did not lost the overview. How?
I have marked my favorites by adding a number to the name. Say I want the rig 'EVH2' as one of my favs and assign the midi number 012 to it...then I rename to '012 EVH2' too. That way I find all my midiassigned rigs as a sequence sorted by name. The ones with a midi number are easy to find, even when the midi assignment would get lost, I could play using the rig buttons.
When I make changes on one of them and still am not sure wich one to use with the band, I add an abcd an so on to the name, like 012, 012a, 012b. That way I know wich one is the mother and wich are the childs and I find these in the sequence of my fav rigs.
That will not replace any editor and I hope we get one soon. But as long as there is none, I'm happy to have my favs sorted by number.
It works well for me.