The only problem that I can see with snipers is the lack of ammo at spawn. The skill gap is much higher than with shotguns or fusion rifles, so snipers should get more shots for their inevitable misses.
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I think its okay as is. Special weapons seem to be intended to setup opportunities, not be a crutch. There's a discrepency in risk/reward when comparing Shotty and Sniper, so I believe that compensates for the higher demand of traditional shooter skill from the Sniper.