^ Yes we do, especially since a Red made a post making a really good argument for it.
As Kat was my main before the relaunch I've messed around with a lot of builds since then, and I've found that I get my best early game damage when I rush Sorc Shoes and Haunting Guise. If I'm up against a really bursty mid (like LeBlanc as people have been saying) then I go for a Negatron and rush Abyssal along with my boots. Usually though, you won't really need Abyssal until later in the game when the enemy actually starts building MR but if they full-on stack it you'd be better off with a Void Staff.
You will probably sell the Haunting Guise later on, but I would almost always take it for the Laning Phase at least.