Hey, thanks for monitoring these! Just in case you're not aware, there's an ongoing OSM community effort among locals in the area to switch the Better Bus routes in for the old routes, which we're keeping track of here: https://wiki.openstreetmap.org/wiki/Washington_DC/Better_Bus_Network. One thing to note is that since some of the new routes closely parallel discontinued ones, it's nice to keep the old ones in OSM until the replacement route has been mapped. For instance, it was really handy to have the Z8 relation when I was mapping the new M54. I took care of the ones you deleted in this changeset earlier this evening (as maybe you saw), but just something to be aware of! Feel free to join in if you see any routes missing!