I have noticed that as well.
I don’t believe that Q is Sundance, but I do think that Sundance is either being fed things to write or has undergone a significant transformation coupled with amazing intelligence sources. He is connecting dots weeks ahead of anyone else, on trade, FISA, foreign relations, you name it.
Sundance is definitely not Q and it's hard to imagine Sundance is the one who is connecting any dots. The guy was the manager of a produce department in a grocery store. He's a thousand miles away from DC. Somebody or some organization is supplying him with information and writing.
I say "they" because I have always felt that there was a team of people posting as Sundance. It seems that they have some new (really good) team members, and as you mention, some amazing sources!