Didn't Axl say in the online chats from '08 that Paul still writes and records with them?
What you said does ring a bell to be honest, he might of well said that. But I still think it's unlikely for Paul to be involved writing wise in the capacity that he was earlier last decade. I think he may see Axl once in a while these days, like maybe every month or so. I no doubt trust they are still good friends, but I think members like DJ, Ron, Richard and Chris have a much bigger role to play in writing these days.
But I also still stand by my view that most of the material on the next album will indeed be Pauls, Fincks and Buckets material anyway. So Paul don't really need to be there, because all of his material is probably still in the vaults waiting to be used by Axl.