A couple different ideas for Dianas "moonfall"

First off the 7.14 Diana changes are clunky. While it is a small buff it's really only a buff because it helped her mana problems a little bit. The attack speed change is more of a side grade and while it seems good on paper it's actually not that effective in game play.

What if Dianas passive was changed to give attack speed per level. Say 2-3% per level.

This would leave moonfall open to new and creative ideas.

Some examples :

Basic attacks lower the cooldown on moonfall by 1. 2 for a champion attack.

If pressed it pulls enemies in, however if held down it pushes them away.

Moonfall gives armor and magic resist per enemy champion hit.

Moonfall procs moonsilver blade on next auto

Moonfall applies moonlight to enemies. Hitting an enemy with moonfall while effected with moonlight stuns