^1
There should be solo-level content for every class and level. If you play a pistol spy for instance, you run out of possibilties after killing dozens of launcher cyclops. Swamp/Snake/Soulcluster-caves? Forget it! Warbots? No way! Firemobs? If you're lucky and find single ones, instead of mass hopper spawns...
And yeah, please rework the loot system and remove all these useless items. E.g. weaponmods, up to 3 in each enemy. zero credits items like (unusable) flesh, metalplates, ..., make them spawn in chests only instead...
Finally, please make the gui more user-friendly and add some key-combinations, e.g. pressing ctrl-leftclick drops an item or shift+leftclick for automatic switch between loot-window and inventory... and so on