Originally Posted by
SirCowdog
Then, as has been suggested several times before: Why not put obstacles or threats in the air to make the decision a real one? Whether it's by putting the objective inside a cave or building, or using anti-air cannons, harpooners to drag a flier to the ground, or flying enemies such as kaliri birds. Doesn't that create a similar obstacle, no more or less annoying than the trash mobs between you and your target? Throw in some terrain, such as floating rocks, obelisks, stalagmites, falling lava, whatever, to complete to similarity.
The end result is going to be pretty close to the same decisions that a grounded player has to make: Do I try to skirt around the obstacles, or just fight my way through? If a player doesn't want to deal with the obstacles, whether they're grounded or not, they're going to try and find a clever way to avoid it. Would diversifying in this way REALLY be so destructive to Blizzard's presentation of the content?