Watching it last night, I thought the exact same.
This final series needed to be at least ten episodes, not six as normal.
There`s just too much material from the previous five series, to finish it all in six epsiodes.
It`s a real shame, as it`s been one the best ever dramas that BBC have ever done ( imo ) and put a lot of previously relatively unknown actors on the map.
Particularly Paul Anderson, as Arthur.
How many tv dramas have spawned a culture outside of the show - clothes, haircuts, even bars ?
Need far more Arthur in the last 3 episodes