There is no such thing as standing still in the NFL. This game, and most teams in it are constantly changing. Kind of like with the Borg in Star Trek, they will adapt.
I agree with the OP, it is the line that needs improvement the most. Wilson bailed us out from their weakness many times last year, teams have learned his tendencies.
It seems that depending on who we have in there we are better at run blocking, or pass blocking. They need to figure out how to get better at switching it up with whoever is in there. The tight end can help, but then that takes away too many other options. This team limited their play selection far too much by using this.
Like I said at the beginning of my post, there is no standing still. A team is either improving and moving forward, or they are losing ground and falling behind.