I'm sure a lot of these guys will eventually get promotions. I think the Sox are now in the mode that a callup to WOO means you're ready to be sent to BOS at a moments notice. Brian Abraham has said as much a few times. I think that's why they seem to be slower with some of the promotions. You need to make sure that all these moves leave playing time for everyone.
Arias is probably moved sometime around the MiLB ASG. Primera could get called up as nobody is going to stand in his way. I think everyone else is just biding their time and waiting for spots to clear up. Once the FCL season ends and the draft happens, the Sox will make some moves to clear room for guys to move around the org a bit more.
Again, I don't take too much stock in the overall offensive numbers at GRE this year. You can tell how they feel about a player with where they bat him in the lineup. If a guy has a 900 OPS, but is still hitting 8th, they probably have him on a lower tier than the guys they keep putting up at the top of the lineup. They are definitely not going to call someone up just because of how their boxscore looks that's for sure.