@Riot, you nailed the Katarina rework
This is exactly what a makes a champion good. A solid learning curve and fantastic out play potential. No overly complicated passives or loaded abilities. Some of her numbers and scaling could use tweaks but she's a really good champ now. Not sure why people are wasting bans on her other than maybe people jumping on her and feeding, but nonetheless this is a job well done.
The only thing I'd say is make it a little more feasible for her to farm in the laning phase without needing to yourself at risk of unnecessary poke.