The thing is his run blocking,which the scheme truly effects, hasn't dropped off. I think having Cogs next to him who is a terrible fit has to be upgraded. His pass pro has struggled this year but he still not terrible. Look at what Philly, Arizona are going through. thinking they upgraded and didn't. Thats what I worry about. We have a good LT who doesn't suck every single play.
FWIW, last year Long ranked #22 in pass pro, and #30 in run block. This year, he is #27 in pass pro, and #46 on the run.