Last year's offensive line was a disaster, even before their starting LT was lost for the last several games.
They were using Josh Fryar as a LT replacement, who was a rookie, and wasn't even on the same page as the other four guys, and that's when it went to becoming easily one of the worst lines in the league (except for the Raiders).
Jacoby Brissett had a very good year despite the bad offensive line play, and if that gets fixed, then I think all of the parts will be in place for Jeremiyah Love to at least have a decent season.