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The strong diagonal seems unnatural with the tree and grass rotated past vertical. I kinda get the feeling that the pipers are blowing hard enough to move the tree branches on the right (those on the left might be cloned tighter/rounder) ... maybe amplify the branches on the right with some motion blur.
I'm not fully sure of "the point" / "message" to be conveyed, but I find myself drawn to the mass (scale) of the tree in contrast with the sky. I have to "work" to put the connection of the pipers to the tree. I kinda get the playful spirit of the pipers blowing over the tree (or so I think), but like you've indicated ... not really there. Maybe others will have better thought @ this one for you.