Katarina Changes (Unhealthy Champion)

I've been playing League of Legends since before Season 1 and I've understood many of the changes that have happened over time and most were beneficial for the game. However, I don't understand this Katarina change. It doesn't make sense that a champion who goes off of resets is able to one shot enemies with her W without even having to use her ult. I just played a long, 50 minute game where I was Bard (With over 3k health and 220 magic resist / banshee's veil and Locket shield) and it was late game so practically everyone was full build. This Katarina took me down from 3.3k to 0 numerous occasions in less than 2.5 seconds and the majority of those times she didn't even ult. That's not healthy for the game or for players in general. It doesn't logically make sense that a champion can blink numerous times as well as proc her W that quickly to where the enemy can't even outplay her. "Oh Reed what if you had a built in stun?" I was playing Bard and landing my Q to stun her, let alone SLOW her was virtually impossible because she could blink so often. If I landed an ult on her, she blinked out immediately. But seriously, give me some feedback. I think this champ is bullshit. This is the second thread I've ever made and I've been playing this game for an extremely long time and the only other thread I made was to report a scripter. This champion isn't healthy at all and it's a joke that she doesn't even need to use her ulti to chunk people anymore. Why would riot make a champion based around resets who RELIES on killing champions to continue her killing spree when all she has to do is proc her W 3 times within one second to one shot enemies (EVEN TANKS)? I don't understand this.