I think Ben will be fine. A lot of folks thought there was a problem with 5* Reggie Ragland because it took him till his Jr year to start. Ben will be a Soph in 18, so I’ll wait till completes the year before saying anything else.
http://www.al.com/alabamafootball/index.ssf/2017/08/ben_davis_really_focused_makin.html
Again though: Ragland was an ace on special teams his first two years. Davis? Nope, not a single rep on special teams. Ragland was playing in mop up his first two years. Davis? Nope.
The article posted was written before the 2017 season and how much progress he'd made, but then even with SEVEN LBs going down, and us having to play guys that were still very, very limited from injury, Davis never had his number called.
If it was just playbook, then why no special teams? That's why I think there's something else. Lingering impact of the ankle injury or possibly another injury that was also limiting him that we never heard about.