I also am a fan of Section 31. I don't buy into the idea it's a somehow a blight on the Federation/Trek. Anything that big is going to have secrets. Things some rank and file can't handle or can be trusted to, things that would take a hardened type.
So SG will have midseason two-parters instead of Trek's tradition of season ending/starting ones.
I did like what was being told in the Tok'ra two parter, don't get me wrong. It just felt a bit decompressed. Out of that grouping on disc 3 I liked Touchstone the best.