I don't exactly mind that much - what is truly annoying is that, if you level up, don't go and get your reward, and level up again, you lose the reward you didn't claim.After my experience yesterday, I'm a bit annoyed that Festival Plaza won't level up appropriately on its own, and requires gathering more FC to acknowledge it already has enough to advance to the next level. Just talking to people isn't enough; they have to give you FC for the plaza to recognize you've enough to level up.
It's only a little thing as this will only really happen after receiving the FC reward for a successful Global Mission, but still.
(e.g. I once forgot to look for which building Sophocles was going to offer me when I leveled up again. Went to the castle and Sophocles only offered one building -and only gave me one item for refusing- instead of two)