I don't see a problem with a 50 year old-show occasionally acknowledging its past. The examples raised in the OT hardly suggest that DW just comprises the Doctor and companions sitting around going 'remember that time when...?' (as South Park's Cartman memorably summed up Family Guy).
I've been aware of DW for most of my life and have seen bits and pieces of most of the old Doctors and my knowledge of the old show is broad but shallow. A lot of the references to the past go over my head ('Nothing goes over my head! My reflexes are too fast!'). I'd imagine that most casual fans are pretty much the same. So I can't see how such in-jokes or references in any way ruin people's enjoyment of it.
A lot of people want new villains and characters and a lot of others want reappearances from past favourites. I'd say the show is achieving a good balance of both.
here, here... well done
