I think he's got more value on the team.
I really liked how Leary played last year. I thought he was very good and got overshadowed by Tyron, Fred and Zack.
But, that's part of the issue, the perception may not be there to get good value for him because he's overshadowed by the other guys.
The knee issue and being in the last year of his contract won't help trade value either.
Meanwhile, we have no idea what injuries hold for us on the O-Line. We could start Collins, see him get injured and then wish we still had Leary. Or Collins may have a longer learning curve than we imagined. Always takes time for young O-Linemen to get used to the wear and tear of the league, the faster speed and all of those stunts and blitzes.
Lastly, competition is a healthy thing in the NFL. I know Collins has been through a lot, but there's nothing wrong with having a veteran push him for a starting spot and vice versa.
YR