Steve Sarkisian's OL recruiting is worse than Tyrone Willingham's OL recruiting... Thats all anyone really has to know to understand just how bad it has been.
Ty signed 25 OL with relatively balanced classes of 5,2,6,5, and 6
Sark signed 18 OL with unbalanced classes of 1,7,2,5, and 3
Sark has signed 18 from 2009-2013 (which is below the average of 19.5 but is the median for the pac12). However, only Colorado and WSU signed recruiting classes with a lower average ranking per player. The only two schools who signed fewer players than UW during that time were USC and Stanford, both of whom signed significantly "better" players to compensate.
OL recruiting during the Sark tenure has been pathetic, it is 8th in the pac12, near the bottom of the pac12 in both quantity and quality.
OL recruiting is a numbers game, if you can get great recruits you need less quantity, if you cant get great recruits you grab a bunch in the hopes that a few will turn out great all while maintaining depth so you dont have to play underclassmen until after you have developed them like a decent coach would.