I don't know if it's easier than calling MS but you don't have to wait until 9a ET and wait on hold for a body. I just did the ADR's this morning for our October trip. Really easy although my ressie never showed up until i was in my 90 day arc. I tried yesterday and it wouldn't retrieve it. This AM tho, piece of cake. You do have to pull up each restuarant individually but if your time isn't there it does give you options which i like. The only one i didn't get was Ohana's for dinner. But we are only going down for a long birthday weekend.
Good luck to you in which ever you do!