While the flying is cool - When you really think about it there is zero purpose to it, and the whole 'flight time' mechanic is also idiotic as you are only flying around to get from mission point to mission point. Once you are in combat you aren't really flying around all that much unless there are snipers you need to deal with...
of course you are if you're playing Storm...her entire javelin is built around staying in the air as long as possible and raining down elemental abilities from up high