I just found out.

[Fathom778]

You know Lucina's air up-a.
It's at 1:50 in the Robin trailer. (I can't post Video right know for some weird reason)
It can be a sudo-recovery.
Try it out.
Gets you a few more inches of air, which can help sometimes.

 

[LIQUID12A]

I am honestly not seeing it. I've tried using it to reach ledges in Training and I've been no higher than I would have if I had fallen normally. Plus it sounds suicidal when you're spamming up air to get distance when an up b sounds safer.

Just me, though.

 

[Einyuri]

I've been trying to recover with her Air A in an attempt to grab the ledge near the end of the move and near the beginning, It doesn't grab the ledge at all like her Up/B. Not too sure it'll work well as a recovery. Besides if you can up B that seems like the better option.