I see your points.
the 15 degree pitch target is a good one for most planes (though I think the f100 had a 12 degree target, not sure).
but a dedicated and properly operational windshear guidance system is something that might over ride the 15 degree pitch.
I would ask your simulator instructor. And yes, I know: avoid, avoid, avoid. But its a sim!
Does your airline allow you to use higher v speeds for takeoff (IE if you are 10,000 lbs below max takeoff for runway in use, can you use the max weight for runway v speeds to have more energy when breaking ground?)