The issue with Guzzi cruisers, in my humble opinion, worth what you paid me for it...
Ö is that in North America, the average cruiser rider is dead set on the image of the north American cruiser rider. H-D, Indian... Japanese bikes that require a second look to notice that they're Japanese. Guzzi doesn't meet that image. They're harder and more expensive to "customize" (and the American cruiser image is nothing if not built around the notion that you have to "make it yours".), they don't look like the American Cruiser.
Guzzi sells to the rider that wants a Guzzi, that's pretty much it. The V7 has extended that market a bit, in that the average standard rider was raised on international bikes as their "image", and if anything, a standard Guzzi just adds prestige to the image.
But cruisers? If you have the money, you buy American, if you don't, you buy Japanese.