Bob. the lane change function is available in the RZ but I've yet to get it to work satisfactory. I also had it in the NX 450+ Takumi I sold last year and that worked some of the time. The idea is you hold the indicator stalk down lightly part way and if the road is clear it moves you over. Most of the time a a message on the screen says function not available or something like that.
With regards chargers, you can add them in the map as -I think- POI and if you press it will navigate you to it. I had a low battery warning come on the other day and it automatically came up with a list of chargers which it would navigate to. As you say, it didn't tell you if they are available.