Bad day for showrunners

Both Rob Thomas and David Greenwalt have stepped down as showrunners for their fall shows (Miss/Guided and Moonlight, respectively). Thomas' decision was supposedly because of "creative differences" while Greenwalt's was due to health issues. I'll probably still watch Moonlight, as long as Jason Dohring is in it, but I don't hold out much hope that it'll be good (poor JD). And since Rob Thomas was the only reason I was mildly interested in M/G, I probably won't bother with that one. Can't we just bring back Veronica Mars and Angel? We'd all be happier.