I think you are quite right on all points. Moffat was a genius writer of individual stories but he couldn’t write female characters (Amy, River, Clara...all sassy, witty - but their lines could practically be interchangeable) and as showrunner he allowed everything to slip after Series 5.
Russell was immensely strong as both writer and showrunner and, quite frankly, such has been the decline into the pompous dull moralizing that now passes for Doctor Who, I find myself yearning for the ‘gay agenda’ that Russell pushed. At least we were entertained during that era. Doctor Who is just not fun anymore.
Get rid of agendas and quotas, and, please, please, get rid of Chris Chibnall (the utter gall of the spotty oik, to criticize Pip and Jane Baker for their writing in the 1980s, when he churns out this turgid mess today). My ideal solution would be to give Neil Gaiman complete power over Doctor Who. He gets to choose the tone, the Doctor, the arc, everything, with no interference from the powers-that-be. Then, I think, we would see something very special indeed.
As it is, we now face a 2019 with no Who at all.
Great. Thanks, Chibnall.
Sesson 9, I think was the best of the series. I liked Season 8 as well, with a darker more dangorus Doctor. Everything somce Clara has been blah.