Well, the Outpost gallifrey forums, as with last week, are almost inoperable due to fan traffic, generally considering this two parter as the best since the show's revival and possibly up with the all time greats.
Unsure yet if I go that far- such things always need reflection.
But it was a good story. They even anwered by central query above about the point of it all, and whilst the explanation does not quite seem 100%, it was at least offered, which is much better than leaving it unexplained.
Good stuff, and well done to Mr. Cornell.