I see what you are saying and in theory agree. Whitt’s D (base 4-3 of old) is fantastic against pro style. See Michigan this year, and Stanford the two previous. UCLA moving to pro style could be really good for us.
On the other hand, Rosen is pretty fantastic, and if they truly have the O line needed to give him 3-4 seconds of protection he could pick us (or anyone) apart.
All in all, I prefer our odds against UCLA in a pro set than I do against AZ in the spread. If that makes sense.