I'm assuming its to make a more balanced experience, but is there a reason why there are like only 4 abilities that almost every character has just in different colours. The characters listed are just off the top of my head. 1) Flashbang....

I play on 400dpi 0.14 to counter my really shakey aim, problem is sometimes I get tired with all the movement I use in my arm to turn, any tips on improving aim and crosshairplacement on higher dpi/sens?