I'm still getting set up, so I don't have too many tags at present. But they will accumulate quickly if I keep using them for contacts in WAITING FOR and AGENDA items.
I find myself changing them mostly because I am still in my setup phase. Sometimes, it is because a leading character sorts in a different order than I wish, and I have to change the lading character. Other times, it is because a client becomes a former client (and I need to change the leading character so it sorts to the bottom of the list, since I don;t need to see it). Having them sort by leading character in the tags list would help me find them quicker, but . . . like you, upon further reflection, I guess it is not that big of a deal as long as they sort that way at the top of the screen.