Well, now, let's break this down.
Slow ROF: Sure, if you want accuracy.
Bad accuracy: Sure, if you want high ROF
Low Damage: 28 dmg per shot's not bad at all, lol.
Sniper mode can't onetap a Jedi: It does 65 damage, 2-taps on body, 1-taps on head, so... yes, it can and does onetap Jedi.
Sniper...