Well for the box event, my recommendations are not of the actual hats but the ways players can obtain them. For Valk, I'd say use the Kafra Shop Boxes only, for the Premium Servers I'd recommend using both a Creation Quest (for some hats not all) and the Kafra Shop Boxes to obtain the headgear. This allows for players who pay that $12 a month to really get their money's worth. Especially over the holiday season. If a player pays that $60 and over the holiday season they get nearly $80(valk prices) in hats for free well that's a pretty nice deal.
But the one "Box" event I want to see what they have in jRO (can't locate the link) but more similarly to euRO. They offer players to Purchase a set of Kafra Headgear (euRO) or they receive a Kafra Head gear and ingame items similar to the Adventures Pack (jRO) Expect they're called Old Blue/Purple Boxes. In addition they also receive an item in real life. Be it a Doll, Purse, Hat/Cap, ect. What they should do is set up Boxes that offer a particular GOOD Kafra Shop head gear like a Pecopeco Headband or a Chick Hat and possibly some new head gear and a bunch of good leveling items and allow the players who subscribe during holiday season to receive a "good gift" for playing.
And yes... we all want Troy back like we want the "Clap"! But offering the other Merch Scrolls from the Poring Mini Game could be an interesting event.