The trap with a rotating celestial sphere and RA/Dec system is that there is nowhere out of it hence the difficulties many would have with the line of sight observation which uses the motion of the constellations along the orbital plane.

https://www.youtube.com/watch?v=TAFvN83NZAc

The ideology based on stellar circumpolar motion completely swamps the observation of the annual motion of the stars along the orbital plane and the crucial line-of-sight motion where the orbital motion of the Earth puts stars in sequence behind the Sun with no stellar circumpolar components such as celestial equator,celestial North pole and so on.

The second surface rotation of the Earth as a function of its orbital motion relies solely on gauging the trajectory of the planet along the orbital plane free and clear of any declination component of the Sun, like the SkyTel graphic indicates, the central Sun is a fixed foreground reference and the motion of the stars do the work of discerning the orbital motion of the Earth and the motions of the other planets along roughly the same line -

https://www.youtube.com/watch?v=MdFrE7hWj0A

It is an enormous undertaking insofar as the RA/Dec system remains as long as it is recognized as a clockwork creation within the 365/366 day calendar framework with its predictive connotations whereas it is crucial for interpretative astronomy that the references for the annual motion of the Earth using the stars and the central Sun be severed from any stellar circumpolar components.

The reward is that it will make people smile to be outside a mechanical clockwork solar system no matter how useful it is for predictive purposes.