He's a late 5th rounder that has never played any significant snaps against actual starting caliber NFL Dlineman. Until we actually see how he does against that, projecting he has a future here is overrating him. Just my opinion.
No, you can often evaluate players based on their college and how they do in preseason. It's how you earn the promotion, by doing well against underlings.
Richards has done well and I will tell you from his college, he has some ability.
This isn't to say we should be penciling him in as the LT of the future but it's completely fair to call that player a good pick with a future on the team, this isn't a Josh Ball wing and a prayer that you are hoping turns into something and isn't a bust of a pick.
Richards will be at least a quality backup and has a lot of potential for more. He was a late fifth but not a reach/shot in the dark late fifth like many of our fifth rounds picks. Like, we took Chris Canty in the late fourth, but we knew very early on that he was a great pick at that spot. There's mid round picks and then there's mid round picks, ya know? Richards was a great selection in the fifth and not a reach.