I got to throw it out there...
Lodestar has very effectively killed all interest in any other Trace Rifle. Its not even a crazy good exotic, minus that primary.
You should really make them all primary ammo.
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I see three options: make them primary with a slight nerf, rework them or delete them. I'd prefer a rework where they are some sort of (charge up) laser that overprnetrates enemies, has crazy recoil (i know thats not physically correct) and deals massive damage but overheats if fired for to long.