I've come to the conclusion that Doctor Who would benefit from having more than one showrunner. People point out JNT and RTD as egomaniacs who ruined the show, but I feel that anyone person with that much creative control over a series will ruin it eventually. Look at Chris Carter and the X-Files. Moffatt will eventually go down the same road. I think that Mark Gatiss should be brought on as a co-showrunner. Each could act as an ego check to the other. Look at what they've accomplished with Sherlock.