I don't think it's anything to worry about.
But when it comes to Guns N' Roses you never know. Just remember how Robin's part was questionable for a little while, after he went to tour with NIN, and all of a sudden he was replaced by Ashba. Also there was never official confirmation that Brain has left the band, he was simply omitted from the official page and other sources regarding the band.
If Richard left/was fired I think there would be very little fuss about it. Robin was much more vital in Axl's the vision of new Guns and he was easily replaced.
I hope Richard stays. If not, bring back Tobias. At least we know he can write with Axl.