It be nice if you have a 5 minute warning before maintenance is going to happen. I don't think it is very nice when your just at end of a mission and get booted with no warning what so ever. At least you could add some type off warning like have for urgent quests. Out of all the online mmorpg's I have played this is only one with no in game warning system.
But there are. Every player in the game gets an announcement similar to the UQ that happens at different times, you can differentiate it because it has a Yellow border instead of blue. The announcement happens 1 hour, 10 minutes, and 1 minute before the maintenance begins.
I'm not sure but since it's an announcement similar to an UQ, it should update it to you every time you change from area (let's say from lobby/shopping plaza → Café/Alliance Quarters/Personal Quarters), I could be totally wrong on this one, since I always spend the last hour talking with my alliance mates either in the HQ or one of our PQ.
