Question is, what the heck do the Steelers do about it?
It's actually very complicated, IMO. We could be looking at three new offensive linemen, minimum, for next season. I don't think it's so much a matter of deciding who is good, as much as it is a matter of deciding who is NOT awful.
For whatever reason, this line has not gelled at all, they clearly do not work well together or play as a cohesive unit. There does not seem to be a lot of pride up front, and they often look very, very lost. Worse than that, they don't seem to play until the whistle blows, which is unacceptable for professionals. Somehow, they have to put together a unit that works--and perhaps work more with Ben on protection calls?--and that may mean starting from scratch.
However, that would make it almost impossible for the team to have ANY success next season. So you simply have to divide who is salvageable from who should be released:
Faneca (his choice, talked his way out of town)
Mahan (might stay as a backup, clearly is not a starter)
Simmons (again, maybe a backup)
Starks (has shown improvement)
Colon (Not great, but has potential)
Smith (Best of the worst--may need a move to right)
Since I don't see Kemo or Essex being anything but backups, that leaves us with a minimum two OL draft picks and a FA singing. I think it will take AT LEAST that to begin putting a decent line together. Our offense will have to be much more vanilla to start the season until that group gets some PT under its belt. Also, they will HAVE to stop the 5/7-step drops. A bruiser at RB wouldn't hurt the line's development, either.
I cant imagine that this line of 5 men, 300 pounds each, is any worse that another team's 5 men of 300 pouinds each, like Jacksonville. What makes their line look invincible? Same with New England, why are they so good at protecting Brady?
Another thing that we have to look at is coaching. Is the Oline coach getting it done? Is Arians utilizing his players' talents? Clearly something is wrong there, and that's one of the many advantages the Pats (and everyone else) have on us.