I think there's a progression. We used to have smaller [-ish] OL who generally weren't very good. Subpar offensive line play has been a problem in our program forever, outside of a few outlier seasons.
Fran went out and got bigger guys, several of whom have yet to prove that they are any good. So we got bigger [think: airport team].
Next step will be to either coach these guys up, or get big guys who ARE better.
Interested to see what the new OL coach brings to the table. His track record is impressive / phenomenal. If he can't coax improved productivity out of this group, then we need an overhaul.
My prediction is that he WILL, and that we'll see players like Mack, Washington, and Cruz make a jump in performance. Still standing by my original observation that Mack is a poor man's Bergeron [which is pretty freaking good].