The ability to add and modify custom tags, that only your account would see, to any user was essential for me on Sync for Reddit. I think with the huge influx of new users on Lemmy and Kbin, as well as the massive amounts of bot accounts that we've also seen being created, it's certainly a useful feature to have I hope it also gets added to Connect.

In terms of priority, this may not be that critical, but the sooner it's added, the sooner people can manage our experience and navigate better. This feature was what kept me with Sync and getting Sync Pro, despite a kerfuffle at the time; because I had invested time in tagging users and didn't want to repeat the effort and start from scratch with another app.