I think that's the main problem with the Tilke circuits - not that they're not good circuits, in fact, some are pretty decent (Istanbul, Bahrain, even Malaysia's alright). The problem is that they're all so similar, eight circuits of the season could well be at the same venue, none of them have anything unique, other than perhaps the colour of the run-off area. And the fact that every Tilke-circuit is between 55 and 58 laps says a lot, frankly, no variation at all.