I am honestly legit ecstatic that RTD is returning. Ultimately, his tenure is what got me into the show in the first place. The Eccleston/Tennant Era will always be my favourite. I've written so much here about how I've felt about Doctor Who over the years. I've always felt RTD is by far the best showrunner. With that said, the occasional two-parter from Moffat wouldn't be a bad idea. I don't think Moffat was a strong showrunner, but he was a strong writer under a different showrunner. His stuff under RTD was some of the absolute best. I could start rambling on about the best episodes during his tenure, but I won't right now.
100% agreed. Moffat was best writing-wise when he got an individual story that he's excited to tell, whereas RTD is better at continuously coming up with stories in order to put a cohesive narrative arc together without getting bogged down.
Yes, I was extremely excited when I saw that Moffat was the showrunner after RTD because he wrote some of my favorite episodes from the RTD era, but he just got bogged down in his own byzantine ideas long-term.