A bit late to the party, but the kicking off of the What If arc is the best episode of AoS so far in my opinion. I have so many questions and I’m super jazzed to see where they take it. Fantastic quality.
Spoilers
But if I have to sit through ANOTHER DAMN SEASON OF GRANT WARD I WILL SCREAM.
Not sure about best, but definitely up there. I’d have to rewatch that episode from last(?) season that’s all about Jemma’s stay on that blue planet, which has been my favorite since it aired.
As for your double-quoted spoiler, I agree wholeheartedly.
I’ve actually heard that a lot about the Blue Planet episodes. Those were really good, but just didn’t stick with me as well as this latest one.