Before you had a plot that lasted about 4-6 episodes and at the end of the series there was usually an event and if you were lucky a regeneration at the end, there was no build up to a grand fight, it was usually just a new or recurring villain, now it seems the entire new series are just to built up for a climatic fight and for it to be good so people tune in or forget any bad episodes.
Interesting to think the Daleks never caused a Doctor's regeneration.