Which also means you can't perform as many primary actions as you normally would -> Soldiers lvl slower...
So nogo for me.
1. Vanilla is something like
AIM = soldier aim - 100 + weapon aim
ex soldier with 72 acc / weapon with 95% acc / target is 7 squares away
72 - 100 + 95 = 77% aim
2. with acc extender
AIM = soldier aim - 100 + weapon aim - (2 * distance from soldier to target)
ex soldier with 72 acc / weapon with 95% acc / target is 7 squares away : 72 - 100 + 95 - (2 x 7 ) = 53%
All other weapon stats are identical. Damage same. TU same. ...
Affects everyone in the game.
The effect is you hit less the farther away the target is from you but also aliens also hit you less the farther they are from you. So is equally fair.
It makes grenades and melee more useful than lining up soldiers for shots. Makes the game more tactical.
Is a great option I always play with. You can no longer get sniped from halfway across the map during night time cause aliens see 3 times better than you. In vanilla XCOM at Superhuman aliens would never miss a hit from anywhere on the map.