Grasshoppers are cool. And a platform has been created to add more features if they make sense. It already can do a bunch of stuff, I advice you to give it a try.
Went ahead and played around some with it. Pretty smooth, handled the 600 or so tabs I had like a champ. The myriad of filtering options are great, surprised I had so many duplicate tabs. Combination of tags and colors is an interesting approach but I found it a bit lacking in ergonomics and I really can't see it being better than Sideberry's tab panels/groups approach (the killer feature for tab hoarders imo). Good extension though, will be keeping an eye on it.