I think Roses fans have delusions of grandeur to be honest. All this, Reni-or-its-not-the-Roses pish. So what? You'll find countless forums for bands who are saying the same things about their respective bands/idols.
If he's the barrier, get rid of him. Re-brand if you want, follow what you need to to get it contractually right, and get the new stuffs recorded.
The Beatles moved on, Nirvana moved on, Joy Division moved on, Oasis moved on. It doesn't have to be better, I just want to hear what Squire and Brown have worked on together, it won't beat the debut, it doesn't have to be the same sound, but at least it would be something.