Ironically (and unsurprisingly) EVA’s costume is basically the opposite of a tactical advantage. The Boss’ at least functions as low cost Stealth Suit (maybe?).
There are some small issues like minor clipping glitches (due to lack of robot hand) and they still sound like Keifer Sutherland, but overall it’s pretty sweet integration. (Longer video here)
(The second one is actually really a big bonus since Quiet’s Grey XOF BDUs are actually her most expensive item to research and deploy in the game – more than her tranquilizer or anti-material rifle!)