This is fucking revisionist history. Hilarious. Trickett implemented the OL scheme Jimbo wanted and dictated during his entire tenure. He controlled recruiting to the degree that he wanted to sign off on offers and dictate recruiting to his staff. Fisher also dictates to DCs what schemes they will run. Jeremy Pruitt was complemented at a booster event for his defense and he corrected the person saying "It's Jimbo's defense". Before and after Pruitt, Mark Stoops and Charles Kelly also ran whatever scheme Jimbo told them to. Blaming the position coaches and coordinators is pure bullshit.
Aside from that, OL was not the only reason for FSU's decline. The culture of that program was rotted inside and out from Fisher's management style. WR and LB recruiting were dogshit as well. Dude left so many holes in that roster that placing it squarely on the OL is disingenuous. The OL was complete trash but that is not at all the "direct" reason.