Finished Endgame (as of right now), here are my thoughts

All this is from the perspective of a solo player btw:

1 - It's really fun, its a PvE experience that mixes DMZ and MWZ with a cool progression system;

2 - The launcher that isnt the beam one is tremendously overpowered;

3 - You should use this launcher;

4 - As of right now all you can do is get 45+ containment level and kill Dr. Falkner on T4 zone;

5 - The exotic weapons should be stronger, and maybe a lil buff on all weapons would be good too;

6 - To progress, i recommend doing contracts until u get into Zone 3, after that do some more until u get the launcher i talked about before, i think the best way to level up onwards is to kill the Fears and upgrade ur guns via clearing the enemy bases.