The Battle Of Ranskoor Av Kolos - This episode definitely does not have the wow factor required for a finale.
The support cast of Phyllis Logan and Mark Addy are completely wasted. The writing is weak. The main cast are not given the material to work with. The pacing is off making the whole episode rather boring.
On a positive note the production values are great.
And so ends Series 11. Unfortunately the weakest series so far. But much as I feared with Chibnall as show runner. As you say there is only so far you can go with excellent production values.
By far the worst thing about this series is after 11 episodes you really have no idea who this Doctor is. The characterisation is very poor. Although that is mainly due to the inconsistent writing I do feel a small part of the blame lies with Jodie. I am not suggesting she needs to be an uber fan but a bit of research wouldn't have gone amiss. It seemed that the only character development required for this Doctor was to be female. Sorry but I require more. Definitely a missed opportunity.