I agree. I also use CoPilot and consider it the best available option (but nowhere near perfect.)
I do not want a GPS solution that requires me to use my data plan, even if maps are up to date. I don't mind occasionally using data for traffic updates, but at least it is an option that I can turn off in CoPilot.
I also use a few other GPS apps (not RV specific) but they do help when additional info is needed. I don't consider myself the norm, I have 2 cell phones and 2 tablets that can also be used for routing and planning.