Sadly true. More than once I've wondered what Smith and Capaldi could have done with someone else at the helm.
As someone who really enjoyed Matt Smith's era (he's my Doctor), I can only imagine he ran out of steam. Peter Capaldi deserved much better.
Moffat reportedly burned out after the whole 50th anniversary affair in 2013, which would have impacted his performance during Capaldi's era.
Considering all the current Trek shows are arc based, that doesn't exactly make it easy to bring in a writer to do "one or two episodes."
Oooooooh. This is a touchy subject with me. Moffat is one of my favorite writers, period, but he really did run out of steam.
I suspect he ended up biting off more than he could chew. I doubt Moffat was prepared for the publicity side of being the showrunner of Doctor Who, which I suspect was forced on him by BBC after how much of a showman RTD was. Then there's the aforementioned fact that Moffat's term as showrunner was during the 50th anniversary event, a period in which Doctor Who saw the most publicity it ever has in the history of the franchise. The show's international popularity (especially in the US) really took off during his term, and finally while Moffat was running Doctor Who he had Sherlock going on, which ended up being a lot more popular then he (or really anyone) was expecting. It's easy to see how this could all accumulate to making him stressed, burned out, and lose steam with his writing.
For real? Elementary is a better version of Sherlock than Sherlock? The fans of Sherlock (and the general public) might disagree.