Excuse my ignorance as I don't know much about cyclocross, but is there any reason why they can't be used on the road?
That's a great price for carbon wheels...
I believe that they are just a heavier rim, with a different lay up, the spokes and hubs are identical as is the rim depth.
I do not know about the width profile. As you know it is important for Tubs to have the bed in as much contact with the glue patch as possible, if the Cross is designed for (say) 32mm tyres, and the section of the rim is based on that and you put a 22mm tyre on then the edges (WHERE MOST OF THE STRENGTH IS) would be less supported and
the glue would under a degree of stress in normal use, which would be amplified when doing something like cornering
Mind you, if it is the other way, designed for 22mm tyres abd you put something bigger on this is less of an issue, because the key contact points (the edge) remains firm, the centre is pulling a way a little, but it is minor.
I believe it is a discontinued model, maybe they are satisfied that the new "UL" road one will do the job for the crossies?
Otherwise we are only talking about 100g over the "road" ones and 250 over the High Modulus CF in the UL
So in short they would be fine for the road if they tyre is appropriate for the