By their own numbers, resolution is excellent at every aperture. Just be sure to stop down for macro shots ... Standard operating procedure for any macro work.
Agree. If the focus shift only happens in macro mode, then it's not too big of a concern to pick the f-stop first. It would behave like a MP-E 65 where focus and magnification are linked. It is a quirky lens though.
It'd make more sense closer to 1k as opposed to 1.5k. I'm guessing the price will fall faster for this lens than other recent Canon releases since its initial pricing is so out of whack.