Really good video to explain it and I even learned that those storage rooms restock every 24 hours (outside of the big yellow box). More loot! From everything I have read you do not lose control points during the main game (though even this is conflicting with some things I have read). End game on the other hand...
https://www.youtube.com/watch?v=0OeIzuQrnNs
The game is far more difficult to me. Primarily due to multiple rushers and of course stupid darkness everywhere. The bosses do seem to be a little more mobile which definitely makes things more difficult when he has a few minions running around. There is a skill that you should consider which can help. Hive Reviver. As long as it is not in cooldown, the Reviver will automatically revive you when you go down. Even when you are in a group. Does not work in the DZ though.
After learning about certain perks a few other things I did not know, I will be restarting my character (was only on lvl 5). Also just purchased the season one pass because the game really does kick ass and I will be playing it for quite some time.