I think in fact a lot of people PAID for that feature in their mounts and now don't want to abandon it. This of course is just conjecture on my side.....
. I can understand their point of view but whether or not it justifies changing (adding other options) to what works really well just now, will of course be a final decision by the developers. For that to happen I am sure they will need to see the justification for putting the work into it. From my side, I can can better understand @jmacon saying that using a pointing model with SGP seems rather pointless (pun intended 
) really.
My TAK mount has NO pointing model and SGP (with astrometry.net & PS2) does a fantastic job for me......as I am sure it does for a majority of users.