Yeah i understand the fact that some player would like to go for legendary food i mean why not, but that not the question, in fact every single ascended feast exist in a non-ascended feast, so why the devs have choosen some of the stat combination to go to ascended and why not all the combination ALREADY EXISTING into standart version.
I don't think it'll break the limit in fact the ascended feast just add a defensive stat (and some experience and magic find(on that point i understand that magic food wont go to ascended because it'll reach even more magic find)).
For many food already existing on standart version but not on ascended version i can't find a good reason on why they didnt exist in ascended, except that the devs have choose arbitrary. If its for a balance reason that seem a bit odd in my opinion because it didnt target any class but all class. That lead to a lost of diversity onto the ascended food.