I get what you are saying, but I would point out that Braxton Jones was drafted 2 rounds earlier (5 vs 7) and he is bigger. Jones is taller, has longer arms, a bit more weight, and slightly larger hands.
NFL draft profile grades had Leno as 5.80 and Jones as 5.97. The draft write up on them suggested Leno might need to slide into being guard while Jones is considered to have more to work with and could develop into an average starting LT, maybe a swing tackle.
The big knock on Jones was his technique needed a lot of work, but he had all the size and athletism you could want to work with. This is where I am really interested to see if this coaching staff can actually really, truly develop guys to fulfill their potential.