i tend to agree with spidi.
unless we're only going to have 1 kind of food, then food needs cooldown, or everyone will just use the cheapest food they can get, never anything else.
probably 90% of items that could have cooldown applied also give some kind of benefit in PK, as such some cooldown will be applied to them, although probably not as longer cooldown time as similar items in EL have.I'm thinking too 'inside the EL box' with that last statement. We plan to have items that do a lot of different, cool stuff for non-combatants, so it prolly wont be "90% of items that could have cooldown applied will".
As Krayon said, it'll be applied where necessary to maintain balance in all aspects of the game