We're in a new arc, in a new age, and with the storyline alone you can probably hit the level cap or higher. So I say the cap lifts 5 levels before the next world (Mirage, I presume), then with the next world comes another 15. So on and so forth. This way you aren't throwing random extra levels in there, but you're also not wasting XP. There's been quite a lot of level cap posts recently and this would put an end to or at least slow down such posts.