Trying to be objective about arma weapon drop nerf:
+ It is less encouraging to farm low levels now (which is good, because nobody likes their streak smashed by someone they had n chance against). Instead the easiest way to gain Karma is by achievements and by fighting worthy opponents (i.e. levelling up)
- It is no longer such an option to out-do your level-equals by grinding Karma. As someone who likes to level slowly to make sure my strength remains relatve, this is a big downer.