There are some problems with the current Nex. Something I have known for some time
I hope my English is all right.
Ok firstly. You don't shoot from the eye. But you do shoot a traceline from the eye, the end of that traceline is the spot where the nex is going to hit.
A second traceline (the lethal one) is coming from the gun to the hit point. The lethal traceline can be blocked by a wall (because the nexgun viewmodel is placed abit to the lower right).
The problem with that system is:
The non-lethal traceline don't go through the first player aimed at, making the lethal traceline to have an skewed angle (depending on distance). This can cause that you miss the rest of the players behind him.
My solution to this problem is NOT to make the non-lethal traceline go through players (that can cause that you miss players that you aim on, depending on distance).
My solution to this is to make the Nexgun kill straight from the eye but making the effect come from the gun as usual. Some of the developer may remember this solution before Trueaim(tm) was committed to the 1.5 svn.
Something else I have noticed is that the shot is sometimes stopped at the first player, I think this is because it hit a gib directly after it splash the player.