I honestly expect our O-line to improve. 2 factors to consider:
(a) Coaching
Last season was severely disrupted by the Coach Foerster cocaine snorting video and his prompt departure. An interim coach was brought in but this whole situation was a mess. In contrast Gase has got his guy in Dowell Loggains from Chicago Bears as his Offensive Coordinator who has brought his guy in Jeremiah Washburn to coach the O-line. There is clearly an opportunity for better stability in the coaching department. Ironically, the Vegas stripper who released the online video of Foerster actually did the Dolphins a big favor by exposing a massive personnel problem that had to be addressed.
(b) Players
In addition to the coaching upgrade, Loggains and Washburn have also brought in Josh Sittons to help upgrade the Guard position and to be the O-line team leader and from reports, Josh is already running the O-line room - he is a natural strong leader and enabled the release of Pouncey because they considered Sittons a better leader (remember Pouncey couldn't train with the other players on certain days because of his hip). They also traded to get Kilgore from the 49ers as part of the move to replace Pouncey. This was all done as a conscious decision to improve. The "Nervous Nellies" who are scared about Pouncey departing should take a breath and relax - Gase, Loggains, Washburn and Sittons have this base covered.
Surprise positive from last season was the emergence of Jesse Davis as an undrafted Free Agent and hopefully he can develop further. We also get Ju'Wuan James back from injury, which is good news.
The better coaching also offers scope to improve the development of Tunsil, James, Davis and who knows, maybe Asiata? Players like Larsen and Sam Young offer decent depth.
I'm more optimistic about our O-line than I have been for many years.