Once upon a time, you handed out free Water Breathing once in The Red Fens. It was a long underwater dungeon. I get it. Fine.
But more recently, you've made the pre-Sharn F2P quest give a free Water Breathing buff and then did it again for a short dungeon in the Feywild.
This is bad. Stop it. *Smacks on your hands.*
There's some core things in DDO you don't mess with.
Every character searches for and preps Feather Fall.
Every character searches for and preps Underwater Action.
It is ancient tradition. Don't phase these items out.
It is one of those things that helps keep Auction House alive.
Next time, put in some air vents or air bubbles that characters can stop and breathe from. Or make the water breathing buff last only a minute or two and needing to be refreshed from air bubbles.
Let players who aren't prepared eat lots and lots of cake, as you once made them do.