OK so i just finished my Omega MKX2 set,and i have the Maco Team Commander Accolade,but i didn't get the Shadow Operative Accolade to unlock,so i don't get my special outfit?!?
MkXII, you mean?
The costume unlocks at the tailor. It is not, curiously, a visual modification provided by your equipped set. You can find it in the drop down options list at the top right of the tailor, where you choose between "Uniform", "Off Duty" and the STF costumes.
It is not, curiously, a visual modification provided by your equipped set.
I think they made it that way in part because putting the STF costumes on turns off kit visuals. It's also a partial uniform (with the helmet at least), unlike an EV suit which is an entire character model replacement.
Furthermore, shoving it in the tailor allows for some level of customization.