When Draven has 2 axes spinning and a third axe in the AIR!
is limited to a maximum number of two spinning axes in his hand. In addition He can also have as many as his AA speed would allow flying in the air.
However, if you catch an axe when 2 are already in your hand, you lose the axe. Therefore, you completely lose that axe, as if you dropped it. My suggestion is to make catching that axe refresh the cool-down of Q.
That will make
even more fun to play and it will contribute to his unique identity.