Either for balancing reasons or because the game isn't as deeply researched as I thought it is. Can't really comment on that yet.
I tried snipers last night in SP campaign mode, they struck me as completely useless, except for reconnaissance which might even justify the slot but... 60 rounds for 1 kill? Doesn't sound too much like sniping...
I see how they must not be overpowered, it could break things fast but making them useless doesn't strike me as a good idea.
What are your experiences with snipers?