I made a post on /r/ffxiv and someone mentioned that I should bring it up on official forums, so i'll just copy and paste here:

So the recent mogstation update reminded me, and quite frequently, that buying food consumables from past events is kinda ridiculous. Like someone mentioned before, $5 for shaved ice is crazy (especially if you have some very hungry fc members who just pick up food in the house).

I submitted a suggestion half a year ago, asking if they could introduce the event food consumables as recipes that you can unlock during the event. So instead of hoarding up on the consumables (as they don’t stack), that event tagged recipes would be really useful. For those who missed the event would be able to purchase and unlock the recipe via mog and can make these event items whenever. Then there would be an incentive to have these items in the game, and for those who like to collect and make more use of culinarian for misc items would be really interesting.

Though I’ve only mentioned this to one of my friends, I wanted to see some thoughts or improvement to event related items