Actually, Tilke's MO seems to be "draw it without thinking of anything at all beforehand". This leads to a jarring course with lots of abrupt, angular corners, which ends up being neither slow nor fast. You have things like the aforementioned angular turns, plus hairpins placed right between two super-fast sections. And of course, it's cobbled together from bits of at least three tracks, if not more. In the end, it's not Austin, it's a hybrid of Hockenheim, Istanbul, and Silverstone.
It's also kind of hard to believe that, in the third-larget country in the world, there wasn't ONE single track capable of holding an F1 race... especially since the Indy road course was designed, just a few years ago, specifically for F1 (as far as I know).
I don't know what the FIA standards are but they have to be pretty stupid if that's true. Do the current standards say a track has to have at least 20 turns and be designed by someone called Tilke?