One play through enough? Ok I figured this would be a good place to start with my question.

I got about 1/2 way through my second play through and then jumped online.  This was about 1.5 years ago.  I’ve since reinstalled the game and started online play, it’s kinda grindy, not exactly what I’m after.  I have purchased the Trader and collectors roles and enjoy them more than the bounties… I like the bounties but the idea of hunting fishing and scavenging is more my play style.  

To my question, Can all the same mysteries/fun places to find be found in online play as well as story mode?