There are plenty of very good skill players out West - the main problem is a dearth of O and D linemen, probably more so D linemen that are big AND fast like you find on many SEC teams. I'm sure DL knows this and will recruit accordingly. Before him, Pete Carroll totally understood that you have to control the trenches on both sides of the ball which I would say is a primary reason why USC was as dominant as it was most times while he was HC. Heck, they even beat highly ranked Auburn teams (at the time) twice in a home and home and thoroughly destroyed Arkansas twice as well, which can be a decent SEC team at times.
IMHO, if PAC-12 teams can recruit linemen like those that play in the SEC, the upper tier conference teams especially would be much more competitive/dominant in their OOC games. I'm going to go against the grain and despite what many say about HC Cristobal, at least he got it right about upgrading Oregon's O-line. That said, in both teams' current states, if Oregon and Georgia were to play each other again, IMHO Oregon would be more competitive, but unfortunately would still fall short, 34-19 as Georgia is a team that is at a whole different level than practically every D-1 team save 'Bama and maybe Tennessee.