Have you noticed that with GNR, when members start doing their own solo albums, that's when things start to fall apart??
The signs were there before, Buckethead went to work on his solo albums and never cameback, Paulo Tobias went to work with Mark Rage and never cameback, Robin went to NIN, he never cameback! Brain went to work with Buckethead, he never cameback! Ashba went to work with Sixx AM, Tommy went to work on his solo albums, and he never cameback!
Obviously Duff and Slash won't leave, because that's their band as much as it is Axl's...but... there seems to be a problem here, when it comes time to record stuff to release, and people start to leave or become uninterested. Even the ones that are actually in the band.
It seems like in between tours, when bands record stuff... in GNR that's when people leave to work on their solo albums. Instead of recording stuff for GNR.