I do know the episode titles for many of season 6, but I don't know anything about the character centricity. This thread is about postulating ideas, NOT about spoilers. I don't want to know any "official" declaration about what someone has leaked an episode's centricity is. What I noticed however, I'm stunned no one else has talked about yet.

Ep 1 of season 1 and season 6 : Various/Jack (plane)
Ep 2 of season 1 and season 6: Various/Kate (plane)
Ep 3 of season 1 and season 6: Kate

Ep 4 of s1 was Locke
5 was Jack
6 was Sun

My guess is the next 3 episodes will play out just like this.

However, here things get a bit tricky. Ep 7 was Charlie, so that'll be an anamoly.

But then we pick back up with episode 8 for Sawyer. How they'll play out from then on is anyone's guess, but I thought this was interesting, anyway. It'll be neat to see if Boone gets a whole episode, or Michael/Walt, or even Charlie.

My guess is that Claire will get an on-island flashback episode to explain what happened to her, and Richard will as well, but all the other characters will probably get some kind of alt-flash.

you're sort of right on Episode 4, although the Locke on Island isn't Locke.

I agree with the rest of your list, I'd like to throw out a Ben epi as well