I can't answer this as it specifically pertains to Rustic Canyon, as I haven't been there in several years. Given other reports about that course's condition in recent times though, I'd say this is good news! If it's that firm and fast that a great player like Matt Cohn feels he has no choice but to putt, to me that's a good thing - in general.
But Matt does bring up an issue discussed several years ago that believe it or not Rich Goodale and I agreed on.. and on which we were shouted down by pretty much everyone else, with as I recall George Pazin leading the way.
And that is, if a course is firm and fast, that's a good thing. That's the best way to play this game. But if the green surrounds on a firm and fast course have little to impede one from rolling the ball on the ground - that is, no bunkers one must go over, no hollows or bumps or other ground issues that make the rolling shot too iffy, or anything else, well... in the end that does make the game LESS fun - as there is indeed LESS variety of shots to be played into such greens. When the ground is very firm and fast, the margin of error for chipping or pitching shots is so tiny, it just makes logical sense to putt the ball or otherwise roll it with some low-lofted club. Heck, remember Todd Hamilton hitting all those rolling chip shots at Troon with a hybrid? That's just an elongated putt... In any event, the case Goodale and I made is that these are all basically the same shot; thus it's less variety, and less fun. Oh it is a DIFFERENT shot from what most Americans are used to, so for us it's fun.... but once you've done it a bunch of times, the uniqueness ceases, as does the fun. It's the same shot over and over again.
And I believe that is Matt's complaint about Rustic Canyon.
Again, I can't say as I agree with that, as I haven't been there in years, but when I was there, I sure found enough hazards and the like such that I wasn't constantly rolling the ball along the ground to the extent to make it boring.
But I do know courses can get this way... that's why the best FORCE you to get the ball up in the air from time to time... or otherwise go around a hazard and away from the hole. Again you don't want EVERY shot to be forced this way, but if NONE are, it's boring.
So should I prepare to be shouted down again? And Rich, are you here to help?