The chance that we will implement this "Delta slew" is pretty small. It's really just masking a problem with the mount or the model and that is where it should be addressed. At some point we have to rely on the hardware to do as it's asked and adding "workarounds" like this just complicates SGP and leaves the ASCOM driver in a broken state. It's not that the delta slew is a bad idea, it's not, quite contrary actually. But it belongs in the ASCOM driver rather than sgp.
I wonder how many have contacted their mount mfg or their ASCOM maintainer about this problem? I realize that it surfaces in SGP but we've more than proven that the problem isn't within SGP.
Thanks
Jared