Without the COMBINATION of options to enable stopping on PV TGs AND to send baseband audio to the headphone jack, it is still a 2 scanners required task, regardless of what you install a discriminator tap in.
That Uniden didn't provide those two things, as of yet anyway, as options is also beyond me. Especially given how long they've know the PSR800 can do this and how powerful those two simple things can be in the right hands. Seems to me it would be virtually no additional cost to do it either. The stopping on PV TGs should be nothing more than a bit of code modification and the routing of the base band audio just a bit of internal circuitry and a bit more code.