It was a solid premiere, but it did feel like we merely checked in on things with a few characters (not the first time the show has done this by any means, but it is still noticeable when it does). Brienne/Pod, Sansa/Littlefinger, and Loras seemed the worst offenders, but even bits that got more time didn't feel like they quite got going. Still I give the first one a bit of a pass as with so many characters/storylines on this show it can be tough to get it rolling right away.
I thought the flashback was well-done. Young Cersei really felt like a little Cersei to me, so they did a good job there. I think once I got beyond this being an odd choice for the first flashback it seemed better. I don't think the scenes with her now really worked that great with the flashback per se, but I imagine after the season plays out as a whole it will fit nicely as an opening scene.
Tyrion and Varys' scenes were my favorite. I can't wait for them to meet Dany (I'm one of those weirdo book readers who likes Dany!). The stuff with Jon and Stannis was good too. I am not sure what to make of the Mance death either. As people have mentioned, he was really underutilized on the show which is a bummer. I guess him not switching should have been expected in the show (unless he did, but I don't think so), but I love those kind of moves in the books and definitely miss them here at times.
Was hoping to see Dorne this week! I guess I have to wait another week. Looking forward to checking in with Arya again too. Even a somewhat lackluster ep like this, I still get a kick out of.