They seem to have the same quality of delivering reliable scripts which are often pretty strong (I'd argue that the Bakers' scripts in A Trial of a Time Lord are the best of the bunch and The Mark of the Rani is also one of the stronger scripts in its season), but ultimately the story appears workmanlike rather than particularly inspired or crafted. Clearly popular with the production team (possibly because they can get the basics right at short notice and don't cause trouble) but mostly derided by the fans - though it looks like Chibnall may have created a new narrative for himself after last week.