I would not cut the WCS Carbon bars. They have metal inserts in the ends to support barends. If the bar is also not designed to be cut (which this one isn't) there is also a higher chance of permanently damaging it. If you are not really careful you could create very tiny fractures in the ends of the bars which could lead to less than desirable results in the long run.
Having said all that, the WCS Carbon is only 660mm wide which is not wide at all for a modern riser bar. I use the Ritchey Superlogic which has the same width and that is the absolute minimum I am comfortable riding with.
Like mentioned in an above post, with a wider bar you will increase comfort and stability but on top of that you will have more leverage for out of the saddle climbing and I've noticed that this can make a big difference for some very technical knarly climbs.
Long story short, don't cut your shiny new WCS Carbons. Thems are sexy bars and you don't wanna muck em up.
