Camera on GrapheneOS is as good as stock Pixel. We support GCam without Play Services and our Secure Camera.
Beyond that if Pixels and the primary focus of the OS isn't enough of a sell for you, I'm not going to be able to. Not my nature.
Other than Android Auto and Google Pay not being available there really isn't a big difference between stock Pixel and GOS Pixel UX wise but the link below shows you what we add...