Yeah, but that's 99% of the players in the NFL that are in their contract year.
Obviously, Carp has his future at stake as a huge incentive to to put in the off-season work but before you can run you have to walk. Being able to lifts weights, run, and train on technique is a huge ordeal for a guy that's been stuck in a training room for about 20 months between 2011-2013. I believe confidence in your body, leads to confidence in your ability, and trusting your ability leads to the consistency everyone wants to see. And we're still waiting but this off-season plus the looming free agency seems like a good time as any for a player to fufil the potential the team saw in him when they called selected him with a 1st round pick.
On a different note, anyone bagging on Sweezy is bagging on the most consistent player on the O-Line last year. It might not be saying much but its saying something for a inexperienced, DT convert to already have 21 starts under his belt in 31 games.
Also, its a tad unfair imo to really judge Sweezy for his lack of expertise and even Carp on the level that he only had 1 year accrued of actual playing with almost 2 years of rehab. Then you send both of these guys out their that are a little green under the ears and tell them to play ball. Then you lose Okung, then Giacomini, and then Unger, who was already playing injured, misses a few games. And you expect the line play to be as consistent as it was with McQuistan being a turnstile at LT, with Unger playing below average, and a 21 year old rookie 7th rounder on either of Carp and Sweez ?
I don't think so. Part of the seemingly inconsistent guard play was due to inexperience and lack of conditioning at the position but a lot of it was because a lack of continuity, familarity, stability, and health at the other 3 positions. Health is the key ingredient for average or better line play.