Overall so far my impressions of the new system is very good. I can actually pick up more traffic and better quality signals (3 sites, down from 1.5 reception at home). Everywhere I've gone so far with my SDS100 I've been in range of one of the site's control channels. As with the old SZII system though, mobile use is annoying. Even narrowing down sites to only scan for CC's, if you want a true "set it and forget it" Favorite List, you'd need to scan 15 frequencies, which adds a lot of lag time and potential missed transmissions in the "loop time". Especially when it's a weaker P25 signal, the SDS100, SDS200, and my Home Patrol II take time to "think" and process the data before moving on to the next frequency.
I would not be surprised with all the trunking systems and statewide systems like CSERN going in, that the next generation of scanners incorporate multiple tuners, say each tuner is dedicated to watching a specific control channel in a trunk system, while other tuners can scan for conventional signals or other systems. Something currently being done with OP25 and DSD+. (I have done this, but need more RTL-SDR's to really get it going...). I got OP25 and DSD+ set up in all of 15 minutes each too, very easy to use and way cheaper than full on scanners...