That's the script editor, Eric Saward. He didn't know what to do with Tardis scenes, so he had people bicker to pad out episodes. Davison did his best to play against it; it gets much worse once he leaves. #DrWho
Producer JNT sincerely loved and believed in the show; he just didn't understand it, so was only really creatively involved in the staff christmas panto. The show lived or died on the merits of the script editor. #DrWho
Christopher Bidmead was brilliant at overseeing Tom Baker's last series, and commissioning for Davison's first. Saward fluked a run of good stories in Davison's last, but after that it was pretty dire till Andrew Cartmel turned it round for McCoy's last two years, which were effectively New Who on a fraction of the budget. #DrWho