I agree with Shirl. Separated eggs and possibly a few extra egg whites should
lighten the texture. You may want to reduce the amount of sugar if you put in
less cream cheese. My favourite and most popular recipe is very dense, but I
have a lighter one that I used to make if you would like. As Shirl said, there
are MANY cheesecake recipes in the archives as we have had many cheesecake
discussions in the past!
Hope this helps.