I think a two-step solution would solve most of the current caster problems:
1. Fix line-of-sight for PvP and NFs so that caster exploiters do not ruin the game for everyone else.
2. Please re-instate the previous NF range and remove the 40m cap.
Most every soldier/enforcer/agent/engineer/etc I have talked to want the 40m NF cap because they don't like NTs targetting them from jets, flying to a out-of-sight place, and then nuking them from afar. They do not mind casters being able to shoot creatures from a long ways off.
So, please just fix the PvP problem instead of hitting us with the nerf bat. I don't PvP much at all (and I don't use the xploit). You are hurting very many of us just to avoid fixing the real problem.
Please no flames, I am trying to be civil about this. I don't like exploits any more than the next fellow. I also have never recommended a nerf for any class. Nerfing is bad.