I used to think the same way, but I specced over to cake after the nerfs to pie this last patch. Change can be hard at times man, but it's like a whole new world. My effectiveness has sky rocketed. Get on the train or be left behind, Jimp.
Cake is just the flavor of the month. Soon all the little c.norris noobs will roll cake and it will effectively be ruined for anyone who wants to eat it.
Stay pie if you want. I just don't see the point in purposely gimping myself, or my raid, by staying as an obviously inferior dessert. Do you really want to be the guy in arena who's dependant on his pastry filling?