Thanks for the response.
The first thing I encountered when I started playing DayZ were control keys that, according to the documentation, were supposed to work, but didn't. I finally created my own cheat sheet based on my user preset file and some trial and error. There are still a few mysteries about that. I'll be glad to contribute what I have if anyone wants it or is interested on expanding on it.
Specifically, the most recent frustration I have has been trying to figure out how to fully load a BK133 shotgun (or perhaps a Mosin). Discussion in previous threads talked about placing weapon and ammo in hotkeys, and with weapon in hand, hit (or hold) the ammo hotkey. Doesn't work for me. I get the idea that this apparently only worked in the older versions. So I'm stuck having to open inventory and drag and drop single rounds to the weapon. Not good in the middle of a firefight.
These are just examples. There are lots of other unanswered questions.