Against Unika in this specific situation, going for this can be stronger than it seems at first because this also functionally OS's laser if you time it right and also jumps delay low. The only thing that directly beats this is immediate low, which is trivial to fuzzy block.
Similar to the deflect shield on landing tech, air IB's also can be used to get punishes where you usually can't
Unika overhead is usually -6, and on airblock in this situation is +6, but air IB makes her +8 allowing for a c.S punish and even spacing for it.