Some few cents about the game.
Progress is in general too slow if you aren´t paying for it. I don´t mind that you guys want to earn some money along the way, but when you have to do too heavy grinding to get proper gear the game becomes repetitive and boring. 3-4 days of playtime and it´s almost impossible to get past Tier 3.
Amount of resources that you collect are not exponential in comparison to prices of schematics. It would take about 40 missions to buy a single schematic. 95% of the gear that you collect along the way are outright garbage and only a few of them (usually really shitty ones) have upgrade slots for drivers.
My cents are a problem that you´ll encounter if gets too impossible to progress along the way without paying you´ll lose the possibility of getting a community around your game.
I´ve only managed once to get a co-op going.
 "Iron Vice"){kind=icon}