9.1 Katarina Patch Note Buff? Nerf? Remake? Rollback?

Katarina

E teleports immediately; cast time now entirely post-teleport. Hextech Gunblade's active can be buffered.

These changes make Katarina feel more responsive to play without stripping away her opponents' ability to react to her decisions.

E - Shunpo

CAST TIME0.075 seconds before teleporting and 0.075 seconds after teleporting ⇒ 0.15 seconds after teleporting (Katarina now teleports immediately upon pressing E)

BUFFERINGKatarina can now buffer Hextech Gunblade's active to fire after Shunpo's cast time completes

Source : https://na.leagueoflegends.com/en/news/game-updates/patch/patch-91-notes