I'm a fan of the Trac5-S and use it exclusively on my Engineer. I find it more versatile than the other carbines. My loadout consists of an HS/NV scope, foregrip, compensator, and soft-point ammo.
You shouldn't be using the Trac-5 S then. You should stick with the Trac-5 or use the Burst. You are suffering from penalties you needn't suffer from because you aren't using the attachments that those penalties help offset. I use the Trac-5 S with UBGL, 2x reflex, silencer, and soft point along with a grenade bandolier and C4 (frag nades). My long range load out is Trac-5 S with UBGL, HDS 3.4x, and compensator with a flash bang and medkits. Probably going to try the shield generator with this load out but normally use nanoweave armor.
I'm not sure what you're smoking bra. I can't use softpoint ammo on the burst or a compensator. The compensator helps control vertical recoil when aimed down the sight while the foregrip reduces horizontal drift.
I always use my Nighthawk, but when I don't I use TRAC 5-S with Underbarrel Shotgun which ONE SHOTS HEAVIEZ W/ SHIELD