i think they are recording and not simply writing demos...
they ll probably keep the rythm parts, drums-bass and probably rythm guitars and add some leads, some more synths and vocals of course.
they probably want to capture the energy of the band playing together live. otherwise i dont think they d all move to nashville to demo one song per day...not at this point of their career..
in the end it all comes down to the material, if jon has a couple more hooks and melodies in him ...
thinfs is an album that got ugly quickly, liked the idea and some lyrics but there was no magic there, at least for me..
ps.wouldnt it be great if jon invited rich for one song at least