Kill and Limegrover themselves prefer bigger, slower, stronger lineman and would take 320 pounders over 300 pounders any day. It doesn't really matter if you are mobile or not when you run the ball up the middle 65% percent of the time with what? A foot splits? There is a reason Wisconsin averaged 322 on the O-line an ran for 3,500 yards last year. We aren't Oregon either.
First off, there's no right or wrong on this. Second, the coaches absolutely never said they prefer slower linemen. I appreciate your enthusiasm, but you can't literally believe they want "slower" linemen? You make a valid point though that we do want big, strong, road graders. That said, if it were that simple we'd only sign guys who go 335lb+ & win the B1G right? No, A guy that size still has to be athletic & quick at the B1G level. Tim Davis tried the "mass kicks ass" model here & it wasn't a winning formula. What we don't want are fat guys, who're no stronger than they would be if they lost 20lbs, plus they're slower & more poorly conditioned because the weight. A guy like Campion might be a good example. I'm not saying he was fat, but if he can slim down to a still reasonable weight, but keep the strength, improve explosiveness, have better stamina & be more flexible, what coach wouldn't want that? Also, players are different heights & that's important. 305lb on Pirsig @ 6'9" is too thin, but 305lb on Tommy Olson @ 6'4" is solid.
Overall it looks to me like the guys who needed to drop some fat di & the guys who needed to gain some muscle did. None of this was random, the coaches, via the S & C program, dictated these changes & they know what they're doing.
The sell on Connelly is how quick he is, how quick his feet are, etc. Ryan Burns after watching him camp said he reminded him of Lauer, but much much quicker. Quickest lineman on the roster if he signed as I recall? He also said Lauer had much better coaching/technique coming in, but coaching Connelly will get plenty of at the U.