1) The cards themselves aren't that great.
2) Your players don't have a whole lot of experience.
3) Their lack of dedication can be seen by how you have only recently recruited 2 more members
Don't get me wrong, there WILL be surprises coming from air. Unstable Gas, flying Owls, and Queen decks come to mind. I just don't think that the element of Air in this situation is going to have the sufficient strength, unity, and diversity to hold up very well.
That and the fact that 3 of your Round 1 matches are going to be up against
AETHER
, and I don't think you'll make it to the top 5, let alone the top 10.