Pretty much every post in this thread reads as anti-Chibnall bias, and it's rather sad and simultaneously illuminating.
As opposed to pro-Chibnall bias?
I would disagree that everything was tied up. What we actually seemed to have was a bunch of things that were inferred to be important that actually weren't.
So Dan wasn't important in the slightest. The reason Karvanista reached Earth ahead of the Lupari was just random coincidence and the reason Azure kidnapped Diane was...was...she's ablieist? Not a lot else makes sense. Dan wasn't really the Doctor's companion at this point and even if he was, why target someone close to Dan and leave Yaz's family untouched?
Who were Swarm and Azure? What were Swarm and Azure? Why was Swarm held in maximum security and Azure simply fobwatched and left on Earth? Were they Timelords or something else? I'm not saying it really matters but after 5 episodes of set up they were dealt with rather easily (defeated not by the Doctor but, er, Time itself for some reason.) Fantastic design and great performances but in the end they were just easily vanquished foes who talked too much.
So Vinder and Pel were just regular nobodies all along, to be honest it's a relief, but still handy that Vinder had a grudge against the Grand Serpent, and talking of which...
The Grand Serpent, in the end just another low level villain who served no real purpose. Did the Sontarans really need him to undermine UNIT all those years? Probably not so what was the point? To give Kate someone to but heads with? It was great to see her but did we really need UNIT in this? And talking of UNIT so they did have a Tardis hidden away all this time and never mentioned it to the Third Doctor? Or in fact any other Doctor they've had dealings with?
The Rogue Angel, I can't recall is Tectuen said something about it? Ah Tectuen. "Yes Doctor it is I, your adoptive mother who you have no memory of and no relationship to and now I'm going to destroy the universe and...ugh I'm dead" Utterly pointless.
And so much happened off screen. The Lupari all died, Diane became an expert in Passengers, Kate led the resistance against the Sontarans. Yaz and co travelled the world (for some vague reason).
This whole season has been 90% set up and 10% payoff.
Yet despite all this, as I've said, I've consistently enjoyed this season more than I have the previous two. Anti Chibnall bias indeed. As has been said I have a anti bad writing bias