They will have a lot more freqs added to the current listing. There will be closer 20 by the time its all done (HamCo is even adding more freqs to the Sys 3 simulcast). After all, they are not just going to be SO , corrections and a bit of EMA once they switch, pretty much everyone will be on it. MCEMA, APD, AFD, MCSO, MCFD's, EMS, the DPW's, as well as every town PD etc.... And yes, there will be encryption, but again, most of the primary dispatches should all be in the clear. It will be P25 Phase I just like Marion and Hamilton Counties, until 2020ish when pretty much everyone is looking to get on the Phase II bandwagon.
Yes there are several sites that need built yet, as well as the usual FCC APCO freq coordinations etc... Will be interesting to watch this since I have never seen an LTR to P25 swap over. Should be similar to the EDACS to P25 switch Hamilton did.