i would like them to flip flop Evans & Anchrum not sure they will because IMO, they want Evans to play Guard because of the lack of depth on the interior, the Rams might have to make a deal for a true guard.
I'm shocked how well Meredith has played, he was a Center at Western Kentucky and lacks size at 6-3 300lbs, but has outplayed everyone at Guard, hoping he's a fine like you communicated. I could see them keeping Jackson because of his ability to play LT, but you're right, he lacks power, he's listed at 6-7 and only 284lbs, so he needs to get stronger, hopefully, he will be able to do that with a year of NFL strength & conditioning.
IMO, at this point I believe Shelton is kept, his snaps have been good and he did improve from one game to the next. Rams have depth at Safety, maybe they can trade one of them for an interior offensive lineman.