I like my Xpan very much, but framing and producing genuinely strong compositions is challenging. I think that without a true panoramic viewfinder, you can produce scenics, but you have next to no chance for street/docmentary work. Working with an Xpan is completely different to a conventional format and cropping. Seeing as framing and composition affects what you have on film/sensor, the two cannot really be likened.
FWIW, the Xpan is one of the most solid, well constructed and 'good to use' cameras I have ever laid hands on. I worked with mine recently in India and enjoyed it, but felt the 45mm too tight too often. I now have a 30mm and will see how that goes. If I do not feel that I can move up a level, in terms of 'flow' then the whole lot will go up for sale. I do, however, have a feeling that the 30mm will be a game changer.
Can anyone point to the work of any photographer using a regular format and cropping, where there is a body of superb panoramic work? I am guessing not and this is my point.