@grrr33nflashThe base weapon preference completely depends from how exactly you want to play that class 😉
Ironically the only specialist weapon (and I'm a specialist main) where I have unlocked anything is the A280-CFE, because sniper play is straight boring imo while I prefer to play the specialist more like an assault soldier.
I'm more they guy who wants to capture objectives, flank and spearhead assaults.
Also the bullet speed is just as high as the other sniper rifles (1600 m/s) , making it easier to hit running targets than with any assault's weapon (700 m/s) on mid ranges.
But yeah, I remember it to be a real hassle to unlock the 3-round burst, all before co-op was introduced.
On the other hand it's also possible to kill snipers on very far range despite the recoil if you just don't burst too fast.
Often these guys won't retreat into cover because they think they have the better weapon and because lag and latency won't tell them in time that they got hit I guess.
Indoors I use the ion shots for the A280-CFE to bust heavy and droideka shields.
All other sniper rifles are still without any unlocks and I don't even feel the drive to co-op grind them.
Well, unless I want to play an anti-vehicle soldier one day. The NT + ion shot has proven to be really devastating in that regards, making the class essentially even better than the heavy for fighting off vehicles.
Like, is the officer the only class whose features are unique enough to not be used by a specialist in a smiliar, but more versatile way?