I have not read all the posts, so pardon me if point has already been made:
I agree the sentiments that lens is priced high; that said -
Lack of IS complainers: Lack of IS is on this range of focal length may be a good thing. Quality wide angle lenses are hard to design an manufacture compared to telephoto. So if Canon had tried to jam in IS, one of the two will happen - a) sacrifice in image quality. b) heavy monster with even bigger front element and at least costing $2000 more. I don't know how many would like that!!!!! Yeah, ideally I would like a lens that could make me focus in pitch dark hand held, weather sealed, light to carry and under 1000 but...... we all know the rest.
Logic of 24 and 28 IS primes within the zoom range - If they pulled off stellar IQ wide open with IS, its a win win. Those you don't absolutely need the zoom can have excellent IQ with IS at relatively lower prices, although I agree it would have been better $200 less.
Reality is, they can't possibly satisfy each and every photographer. At least I can see the point why they came out with this lot and config..........