As Mike Clayton explained to me yesterday, the fairways at RM are better from a design standpoint. Because it is a thicker, more dense grass, the ball doesn't run as far as Santa Ana. This is another way that RM counters technology: the course plays longer than the other sandbelts becuase of the fairways. These fairways provide a perfectly reasonable surface to hit the ball from, which is all that is really necessary. There is still plenty of run, but you don't see the ball rolling along the ground like could be expected at Metro.
Metropolitan fairways are great to look at, walk on and play from, but the ball runs so much further than it should. Metro has also sparked an expectation for perfection that is impossible for all but a couple of clubs, who need a huge budget to even get close.
For my mind, the fairways at RM are more desirable, because they don't compete with the integrity of the design, and these surfaces are attainable for most clubs.
The only surfaces where so-called perfection is desirable is on the greens, and this is where RM gets it just right. Those are the best surfaces I have seen in my life, and they weren't even shaved down at that stage.