RIght. It sucks because of all sorts of things YOU have identified as a problem, without ever seeing how it works. Brilliant! Really, absolute Genius!!!
If in fact the toilet isn't formed properly, that would be the first one I have heard of that made it past QC at the factory with the bottom 1/4" off. It would also be the only one that I had heard of with a giant crack in it from the factory. (SHipping damage is another possibility.) This would be standard at American Standard, but not at Toto. If that's the case, it's a real fluke.
And it would be the only thing you mention that is a problem. If true, those are molding problems, i.e. execution issues. Or shipping issues (the crack).
THe other things you mention are design issues. Guess what? This toilet didn't get to be the highly-regarded, long-marketed item that it did because of poor design. The design works.
If you got a bad bowl, it's unusual. And I would just go swap it out for a new one, which will doubtless be fine. Then I would install it, and love it, as I do my two existing Drakes and my Carlyle II.
But, hey, it's your money. Just a shame that you got so turned off and fired up when you made the right choice in toilets. Plainly, the Drake wouldn't be so wildly-popular a toilet if this experience happened to more than the occasional customer.