1. Please do not use iD if you can. Use jOSM. iD sucks at arranging member order, and can cause a lot of havoc (e.g. node discrepancy)
2. Please always add the tag public_transport:version=2 for routes. That way others can verify your work more easily.
3. If you find there are other map features needing change, do those changes first. Keep your final change set clean with the bus route relation(s) being the only constituent(s).