So, figured I'd play around with Leona and figure out a few of her neutral stuffs. I don't think it's listed in the wiki or not, but there are a couple of guaranteed cross-up set-ups that Leona has that seem pretty easy to get.
Off of any knockdown like her earrings, orb, or a sweep, you can quickly super jump and do j.C
Doing it deep will cross them up on wake-up. I couldn't even DP when I made the computer do this set-up. The jump looks ambiguous like SAB-CA said earlier in this thread so it's hard to tell if it's going to cross up or not, especially on wake up. I think scoring a hit and following up with a crossup is good too.
You can apply hop pressure by throwing out low Bs. d.B x2, hyper hop C or D can be a cross up as well. A regular hop will go over a crouching opponent. It's not a discovery, but atleast knowing how to get in some way with Leona with examples would help.