The problem with depth on the OL, as we all know, is that it really is about five acting as one being affected by one loss more than any other group on the field where it's the epitome of 'you are only as strong as your weakest link'. If you do not depth at all five positions, then you have no depth at all
The problems are the lack of resources used as well as the effectiveness of those resources. We used a 1st rounder on a LT and while it was bumpy for a bit, it turned into a quality starter. We spent a nice contract on a vet (only 27) OL in Pugh and once we got him to his best position, he has been a decent starter. Now, we spend on a 30+ C and put him in a different offense, he doesn't like it. 3rd round picks or later, haven't developed into anything at all. Beachum has been a nice vet budget signing, but his play is close to his compensation that top tier.
And while outside of RG, we have an ok group of starters, none of those players is good enough to compensate for the trash players behind them. Also, when guys are showing inclinations to retire, instead of using the appropriate assets to replace them, we try to convince them to come back and hope they do.
It's like Will Hernandez. He isn't a bad player to sign and compete with a player like Pugh but he is a nightmare when he doesn't have to compete with anyone because the rest are so bad.