New Conqueror is EXCEPTIONAL on Katarina
I've played a couple games on PBE and while she loses a bit of early trading potential, once you hit mid game you are able to proc it almost instantly when you jump into a teamfight, and she becomes a monster, it's really good and really fun. I was even able to build somewhat tanky and still do damage, very cool keystone and a welcome change from Electrocute. Also it allows you to have Triumph, Coup, AND Legend: Tenacity, while still taking Sudden Impact and Ingenious / Ravenous Hunter, which made her a lot more slippery and I was able to take a lot more risks.