Wall hopping with Kalista
Can be pretty frustrating. There are many places that she can cross, however some of them require perfect placement to achieve, and will often result in a frustrating fail if you don't practice. (for example, there is a thin section of wall in the baron pit that is barely manageable).
For this reason, I think the hop on her q should get a slight buff. I don't think it would put her over the edge, and it would make her wall-jump attempts a little less risky. Just my 2cents.