Mac and cheese in the box is crap. Try using a nice Penne or rigatoni and make the sauce out of a béchamel and add a few nice cheeses and maybe some seafood or prosciutto or pancetta.
I think that the marscapone will be heavy for this unless you make a gelato out of it. The apples really don't go with the dish. Maybe a coconut tuille or mango purée to keep it tropical. Your mixing too many cuisines. Also maybe put the pineapple in puff pastry or phyllo to keep the heat. Hope...