Why not O-line "specialists"

[SunsetBengal]

(08-14-2019, 03:56 PM)fredtoast Wrote: Same thing that happens now when we check to a run out of a 4 WR set or check to a pass with a 12 personnel group.

Every NFL team ALREADY switches personnel groups for passing situations.  Defenses already bring in different linemen.  My question is why shouldn't offenses do the same thing.

Are you talking just for a play in a critical situation, or are talking about having essentially two "platoons" of OL that rotate in and out as dictated by down and distance, like with DL?