Thanks to domestic playback devices (VCRs, DVDs, and now BluRay) we now tend to watch the entire stories in one sitting. But you must keep in mind these 22 minute long episodes were originally aired once a week. So, a certain percentage of the dialogue may repeat some points established in the prior episode, particularly since the BBC did not repeat the last segment right before the newest broadcast.
It has been joked that if the corridor running sequences were removed, the serials would run maybe 25 percent shorter. Then again, the same could be said about your average summer blockbuster.
Have you tried spacing your viewing? No, not 1 episode per week, that would take half a year or more to watch a single "series". But try 1 episode per day. That's how a local PBS affiliate aired them when it first got the rights to air Tom Baker adventures starting in August 1982. 82?! Has it really been 20 years for me?! Dang! Anyway, an epi' an evening might help your concerns with the more methodical pacing.
Sincerely,
Bill
Honestly, not watching each story in one sitting but spacing them out over four to seven day just isn't going to improve the pacing of these old Who-episodes.
Even considering the fact that they where done in and for another time and for different audience expectations some of the oldWho is simply a chore to watch.