3-hour Return Coupon Expiration Not Implemented?

Ehh think of this way...If you just missed the moon gate by a few in-game minutes, but still have the coupon, then it only takes like what...1~3 mins to get to Ceo, compared to waiting a whole 18 mins for the gates to open again...

for TNN, there's getting the pass, then there's also traveling from Dunbarton to Bangor. The distance between the two towns is quite large, not to mention the running the dungeon will take about a few more minutes. IF the moon gate open, traveling between the towns is no problem at all. However, you'd still waste time between the moon gate to the entrance, and then getting into the dungeon afterwards.