this but even he barely carried the mediocre writing. I was really hoping for something as good the writing in the other David Tenant seasons. It was fun but dissapointing. I guess my expectations where too high.
I think the dialogue has been as sharp in the recent episodes as any older RTD Tennant episodes, maybe even sharper.
However the characterisation and plotting have been a more... stylized. I think the issue is that when RTD started on nuWho he was coming off having written several relatively naturalistic shows, where people actually acted like people, and the stories played out like stories people are in, as opposed to people acting like "characters" and the shows being extremely trope-y.
And this impacted a lot of his Who writing, which was initially more naturalistic and less stylized (not that there was none, just less). Over the years he worked on the show, it gradually got more stylized, before becoming more stylized still under Moffat (Chibnall dialled the stylization back, but was such an inferior writer in other ways it could hardly be seen as an improvement, merely a change).
In the intervening period since leaving Who 13 years ago, a lot of RTD's work has been for children, or just extremely stylized and totally implausible because he likes it that way, like the mind-boggling awful (despite some inexplicable positive reviews - or rather highly explicable but not for good reasons)
Years and Years, which tried very hard to be "worthy" but my god nothing resembling human behaviour or plausible political developments took place over any of the 6 episodes (which also showed an actual negative grasp on technology/technological development - and indeed some elements of basic human biology, but that's a whole other discussion). By that point he was basically writing tropes and "characters" and nothing else.
(I've not seen It's a Sin and it sounds like that may have been very different, perhaps because it's closer to his heart and dealing with real-world issues - but Who is absolutely back in the "characters not people" territory to judge from recent episodes, and I personally feel that it suffers for it. Not that it's bad - just that it's not as good as it could have been had he written things more naturalistically - which is entirely possible to do even ludicrous situations - hell, he's done it before.)