Yep. Those who actually watched the games knew this has been a serious problem for years.
1. Miami’s biggest offensive problem last season was not Ryan Tannehill’s injury, Jay Cutler’s divergences, O-line coach Chris Foerster’s infamous video, Julius Thomas’s disappearance or the wide receivers’ inconsistency. It was the offensive line, which head coach Adam Gase never fully trusted. Every 3rd-and-long became a checkdown drill and primer for punting. Gase’s once-potent receiver screen game became ubiquitous and predictable. The ground game became an afterthought.https://www.si.com/nfl/2018/08/08/miami ... fl-preview
This team cannot rebound in 2018 if its front five doesn’t improve. Over the offseason, Gase and GM Chris Grier let center Mike Pouncey go, replacing him with seven-year 49er Daniel Kilgore. They supplemented this move by signing 32-year-old guard Josh Sitton. Overall, it’s a downgrade in interior O-line athleticism but, the team expects, an upgrade in reliability. Gase and Grier attempted a similar move at right tackle, shopping expensive 2014 first-round pick Ja’Wuan James. No motivated buyers appeared, leaving the Dolphins to simply hope their gifted tackle plays better. That hope is even thicker on the left side; third-year pro Laremy Tunsil has some of the sprightliest feet in football, but scattershot technique and awareness led to routinely poor play in 2017. There’d probably be serious consideration for moving Tunsil back to left guard, where he dominated as a rookie, but this roster has no other quality tackles. If the incumbent players don’t progress, neither will this offense.