I thought it was a good ending, but don't think Wainwright landed the story arc very well, so it relied on the great acting and good script to carry the story through. I do like that she avoided more conventional final episode narratives - so many go down the explosive over-the-top route, so to have Catherine and Tommy alone in the kitchen was a great shout, and that particular ten minute two-hander was complex, challenging, enthralling stuff brilliantly delivered by Lancashire and Norton.
The story arc shortcomings were in the poorly realised endings for several subplots, which felt like the equivalent of wedging in 'oh, so and so did this!' and 'oh, by the way, so and so was that,' and I get why one particular storyline ended with that text, but it again reaffirmed a feeling of rushing the ending. As another example, having invested in Siobhan's Clare over the last ten years / three series, I can't say I was satisfied with where we left her.
Oh, and Wainwright knew exactly what she was doing with that 'you should join the police' chat on the stairwell insurance policy - clever cookie!
Overall, a solid 8/10 and hopefully some awards for Lancashire are in the bag. Now, Wainwright or someone needs to write something for a Siobhan Finneran lead.