As a newcomer to Android a few years back, I was overwhelmed anyway, knowing only Nokia and Apple phones at the time. The simple, well-organized way Nexus did things had me up and running on my Samsung Galaxy Nexus in a week or two (yeah, I'm slow).
With this mess, and not knowing how to do the things you just suggested, the phone would have been returned.
If you forget the performance increases over the years, the Samsung Galaxy Nexus is the nicest Samsung phone I've ever had the pleasure to use, and I still have it. Zero bloatware, easy to use, and everything that was needed was so easy to get to. In fact, if Samsung were to take the exact same phone, add the new electronics and maybe the waterproof housing, I think I would already have bought it.