Frankly, what it sounds like to me, based upon all of your responses to this thread, is that you played Katarina by building attack damage (which is perfectly fine) prior to the rework but post-rework, you refuse to accept the fact that balance changes are made based upon playing a champion optimally and not with some niche build that was tied to a previous incarnation. Time to get with the program and accept the fact that your champion's different now.
Do I refuse to accept that Kat is different? No, I accepted it after I found out everyone and their mother could play her to some degree after the rework. Unfortunately for me, I can't enjoy the champion if I don't add unnecessary challenge, because easy/repetitive champions are boring to me.