First off, I enjoyed your thorough review. I have a couple comments:
I don't think the Konis are "soft" at all. They definitely have more compliance than some of the setups out there, but definitely not at the expense of performance.
The softness you feel might be your springs. While an improvement over stock, they aren't quite as stiff as JDM Pinks. Plus, if anything, I think that your Konis may be overdamped. I run Konis with Ion Performance Sport Spec springs (which have rates comparable to JDM STi pinks- i.e. a bit stiffer than the springs you're running), and I find that the springs are pretty overdamped on the street with anything greater than 3/4 turn in the front and 1/2 turn in the rear. Try dialing the Konis back a notch, let them break in, and see if you like the handling better then.
Also, did you get your alignment yet? That may further reduce feelings of sloppiness.