Some of it is scheme. The rest of it is injury and lack of talent being exposed. Offensive lines get studied by opponents just as any other position. Over the years we've done a lot of patch work strategies to cover up the lack of talent, but those tactics are starting to dry out.

Evans is a real talent, but is not fully healthy. After him, there is not a single starter on that line who is really a legitimate NFL lineman. Armstead fits this scheme with his agility, but (apparently) he isn't ready technique-wise.

That's baloney! There is nothing wrong with the talent on the OLine. Last season they used gap blocking and they did just fine. The Saints had the same guards and center. If you want to say the scheme doesn't fit the personnel then you are right. But to say the OLine has no talent is ridiculous.