I've tried SCAR Iron, Laser & Reflex Sights for several weeks now. In the end I found SCAR + Laser was the most comfortable. However it has disadvantages that balance it out too.

1) It has no crosshairs when in grenade launcher mode (You lose the sense of adjustment) which I always equip, so I'm forced to change my habit and switch to extended clip or other under the barrel attachments.

2) The laser compromises your position at close/mid ranges so you are easier to be found by your enemy since it's like a beacon.

Another reason I prefer Iron over Reflex sight now is because the red dot is too faint on the reflex and bleaches out when I'm in bright environments like Skyline etc, Iron sight does not have this problem.

Finally, life is unfair in many ways. You either adapt and make the most of it or fail.
Also anyone who uses SCAR + Laser are verbally abused or encouraged to be kicked. Even on SiTH servers there is a "Gay Lasers" mock slogan.
As long it's users don't cheat they should have the freedom to use whatever suit module/weapon they choose.