i think the game is challenging but not too hard.
i already said that this game shouldnt be with so much luck.
but it should be harder and without luck but not easier.
i like a hard game because i always win every game at first time
sherrifs got a skill to make teammates better.
also i trained much in this game and 1 week i didnt come any futher because i didnt get any new weapon,so i shot up to lvl 20 with lvl 1 gun.
the auto save and so on is a good challenge,i always win every game in the first time but now i see a challenging game.so it better shouldnt be removed.
at all the luck should be a bit lower but so that the game is more harder and not easyer.
if you got luck you can survive the first(and hardest) levels and can train many useful skills for it,sherrif is best if you got luck on the first lvls.