I've heard some really bad things about dirty bomb, especially the grinding and the borderline pay2win nature and now apparently hackers are really going to town on the game.
ive been playing it a fair bit. there really isnt much grinding, to be honest. At least for me. I've just been playing for fun non-stop and accumulated a bunch of coins. I guess playing as mechanics could technically be considered pay2win because they can plant, repair and defuse super quickly, but mercs rotate quite often. You can get them fairly quickly with coins anyway
as for hackers, i havent noticed any