as of 5.1 you can't pick up another feather while you already have the buff. Plus unless you're talking about LFR, that's basic positioning I'd expect of any raider. Doubleplus, once you get used to it, unless people are stacked perfectly on top of you, you get a hang of casting it so you're sure it goes on you. I don't usually feather pre-emptively but cast it right below me as I start to run. the true strength of feather is that it has (effectively) no cooldown, so even if you have to stop for a second to heal during downdraft (at which time B&S may have ended), you can just throw down another feather and stay on. Not really an issue on normal mode because there's absolutely nothing to heal at that point in the fight.. but still :P