For commuting I don't think carbon is such a great material. I am not convinced that daily use, with potholes curbs, locking it around poles and the general abuse that commuting bikes take make this a good bike for commuting. Yes, there are people who use carbon for commuting, but look around, what are most people using and ask yourself why?

Again personal preference for me, 25mm tires are not enough for a comfortable commute. You say you may be able to fit fenders in there, but it sounds like you are not sure. The PNW bikes really need fenders. I like the disc brakes, I like the tall head tube, I like the group it comes with, all great features.

Is it a nice bike? No doubt. Worthy of being a commuter bike? Not in my world, but maybe yours. There are so much better options out there for a commuter.

Now if you said the occasional commute and this is your go fast bike for rides outside of commuting, different story and maybe workable. Where are you going to lock this over $3000 bike? What kind of commuting are you going to do? How often are you going to commute? What distance are you traveling? Is this your only bike?

You can almost get a custom made commuting bike from a local frame builder for the money you are going to spend. It won't be a sub 18 pound bike, but you will be helping out your local community. Also in my opinion I would never buy a Specialized bike again in my lifetime, for all the frivolous lawsuits that Specialized can come up with. As a Canadian, I will never let go of the Roubaix Cafe bike store in Alberta go. That was beyond stupid. Maybe you don't hold a grudge like I do. Good luck on what ever you decide.