When&why Finese? Lets say you are one shoot sniper, the build mentioned before. With 10LK and two more criticals, your chance to score a critical into eyes is 80%, 8 out of 10 times. With finnese, you will score crit 9 out of 10 times. That gives you almost no bonus. To head its 60% to 70%, also not a superb deal.
On the other hand, you could make a support build with only 6 LK, two more criticals but a lot of APs and brof. If your main fuction will be to cripple arms and legs consider taking finnese, since it will raise your chances to score a critical on hands significantly (from around 40 to 50.) You dont need to do the damage, you are a support build anyway.
But as EW, crriplers are not that good. Lower range is not as big problem as that you will always give out your location with a laser beam.
Finesse is bad for EW Sniper, because SG sniper have good armor penetrating capability. I'm not talking about bypass, I mean 223 ammo has nice countermeasures against target DT and DR.
Actualy, it almost doesnt matter if you do the 8 dmg with sniper rifle or 0 with laser, so that point isnt realy valid. Plus finnese is applied after the DT/DR.