I agree with everything you said. Plan to install seat belts and I've been looking at the possibility to install a net for the entire sleeper area for use while driving. I've never been a fan of people roaming around in motorhomes while driving.
I hope to spend an hour or two with dealer going over everything. We ordered essentially every option available and I have no idea how to work most of it. Our dump truck has a shifter, clutch, brake, throttle, and PTO; that's about all I know how to operate.