50 hours so far on the game, I really enjoy it must say, good concept.
If I was to critique the game I would say that they desperately need to sort out the matchmaking. The fact that you can be a relatively new player and find yourself in a match with geared up lvl 40s or something, or even you can be solo and find yourself up against a group of teamed players, is a truly stupid game design decision. For me, its ok, I'm used to these types of shooters but for new players I could see a lot of them quitting due to being in impossible to win situations. Thats something which would cause the playerbase to stagnate and eventually die off.
The solution is pretty simple, they should put solo players only against solo players, and then have duos, squads etc, similar to other titles and also simply bracket the players, 1-10 , 11-20 and so forth (or wider brackets if playerbase isnt large enough for that)
Do that and I think they could ensure a slightly wider and larger userbase