OL last 5 years - try this try that approach
There has been no real plan on fixing it. Just a hodge podge - go with FA, go with veterans, draft a bunch in the same year, etc. Just random throwing darts and none of the trial and errors, mostly errors, have worked.
But given the personnel mess, I don't think any offensive player is as bad as they appear. Move OL, WRs, QBs elsewhere and you will see a better performance. The entire offensive environment is the system that is ran (Invincible in the Rain Offense) is toxic.