Oreo Cheesecake

In a frenzy of seperating the frozen Oreo Cheesecake slices up, I forgot to take a picture of the whole cake. The biscuit crumbs at the topping made a big mess on the table. This is the only slice of cake that I found decent and snapped a picture of it.

My son asked for Oreo Cheesecake for his birthday. I found a recipe on the internet and decided to do a trial run. The outcome was pretty good. Well my son liked it and YL reserved 3 slices.

I wonder if the cake would be lighter if I were to whip the egg whites seperately before mixing it into the cheese mixture. Should I risk a failed birthday cake by attempting to whip the egg whites before mixing into the cheese or should just follow the instructions of the original recipe.