There's no way a pilot would black-out on a cat launch. Ever.
The maximum G on launch on the Stennis, should peak around 3-4G. (3 secs, 150kts)
The bug here, and it IS a bug, is not just transverse G though. Turn off G-effects in Options/Gameplay/G-Effects, you will not black-out and you then can clearly see the aircraft bouncing oddly down the deck on launch.
In a mission (Operation Eclipse V2) that I have flown with no issue several times last week, this new feature causes the nose gear to break (it will not retract). I think this is 100% repeatable?