He would obviously look lost on the right at the Senior Bowl because he has been playing on the left all through college.
He is not going a be an upgrade in the running game over Leary. He could eventually surpass Leary in Pass Protection; although, Leary did shut down Watt. Leary did struggle with Cox later in the season, but if you recall he missed a game at some point with an injury and seemed to slow down a bit afterwards.
At RT, Collins could potentially be a big upgrade to Free. They limit many of their running plays with Free in the lineup because there are some blocks that he can't make. Free has significant problems with pure power blocking. They would go power right often when Parnell played but avoided it with Free in the lineup. Free was better on backside zone blocks than Parnell, but Free was not close in power blocking. They could get back to really slugging it out if Collins replaced Free.
Back to Leary, they might indeed want to develop a replacement because his knee issue is a big unknown, but in terms of Collins making a big improvement over Leary in 2015, I don't see it.
The LT to RT comment isn't entirely true. A dominant LT can usually slide to the right without looking absolutely lost. He may not excel, but he shouldn't look overwhelmed. I think most of his struggles will come from leaving a very run oriented LSU team and transitioning to a more balanced team in the NFL.
I don't think he is an upgrade to Leary
anywhere right away, which is why I said in the Leary thread trading him would be a huge mistake. He's going to need some coaching and some game time to get used to the nuances of being inside in the NFL.
Collins may potentially be a big upgrade to Free on the right side, but I don't think that's why they went and got him. I think Free is a good and very underrated player around here and Collins has a long way to go to supplant Free. If Collins goes to RT, it will be because Free retired or they cut/let him go. I don't think he'll ever outright replace him.
I am guessing you're making the Leary comments in regards to someone else's posts or just speaking your mind, because I haven't made any suggestions about him replacing Leary in 2015. I didn't even allude to it. That said, I think it's equally as likely Collins relieves Leary as it is he relieves Free, when the time comes.
Remember, these same discussions were had when we took Martin. A lot of people thought he was going to be Free's replacement. Once they saw him at guard, however, there was an immediate click and that's his spot. I think the same thing could happen with Collins mostly because of his style and where his gifts lie.
Perhaps just as likely is, Leary to RT and Collins to LG.
All of that aside, in a couple years Collins will be the second or third best lineman on this team so no matter where he plays he'll likely be an upgrade.