Modern Trek has proven itself to have far more conservative values than The Original Series did.
I've alway seen the later Trek as the more liberal in it's philosophy, and the "60's Trek as possessing the more conservative values.
they should incorporate the Baku into the UFP, which would of course give them access to the system's resources
They already had access, whether they will "post-movie" avail themselves of those resources, that the question.
If the Baku were sent to another Federation world, to be incorporated, what would be their fate? Their situation would be similar to when they first arrived at the ring planet, prior to the realization of the rings properties. A new community to build, and a life to lead, this time perhaps with the assistance of their Federation neighbors.