Unanswered questions after Season 4 finale

I thought they had a plan for season 4 - but after the finale not everything added up.

Here is what's missing:

- Where are Addy, Red and Dr. Sun? (Just written out?)

- What happened to the people from the convoy and other people who just vanished?
(I thought they were already victims of black rainbow - but apparently it wasn't launched back then) (A test?)

- Was Dr. Keller a good or a bad guy? Was Warrens Mission to kill or save everybody?

- Does NewAmerika exist? (President says no) (Maybe that was the answer)

- And what did the glasses guy in the end want? Stop Warren to kill or heal everybody?

- Didn't Warren pull more then 2 cylinders out of that lab cabinet? And even e few in earlier episodes? (Maybe the continuity teams failure ;)

- And what happens to the world now - with the mixed up containers in the drone?
(Ok, that is the cliffhanger)

- Red Murphy? Ok why not ;)

The season started strong and had a few very good and funny episodes - but I hope they weren't making their story up - on the go. We'll see in season 5.