Lower price - With that display and all the associated HW that wasn't going to happen. Next year we'll probably get a doubling of NAND, but the price won't be lower. After all they can't keep them in stock so I would argue that Apple priced them too low for the market*.
Lighter in weight - Again, the display. Even without the dual light bar it would likely need a larger battery to deal with the display and associated componets thus making it heavier, mostly because of the battery with a little for the additional casing material and any display panel weight. Note that the iPhone has gotten heavier on many occasions.
Longer battery life - Again, same thing with going Retina Display.
Bigger screen - You're talking about an entirely new UI. Add that to a new resolution for the 9.7" model and you just add insult to injury. Plus, this would fly against your desire to also make it lighter and have a lower in price
3D - I don't even now why that would be an option but it also would add cost and lower battery life.
8mp camera minimum - That could have happened. I can see that as a feasible expectation.
HD FaceTime camera - That didn't happen? I'm a little surprised since I think the iPhone 4S has it but I also don't think it's a big deal all this considered.
7" iPad Mini - That would be something that would come later when Apple isn't getting developers to start working on a new display resolution. Plus, with all the leaks of the 9.7" display there were no leaks of a 7" display.
* that's an economic observation not a desire for the prices to be raised.
A lower price isn't a far off out of this world idea. These things are pretty pricey for the actual use you get out of them.
The lighter weight would have simply been the result of components inside shrinking or the PCB being streamlined, also not a far out idea.
Longer battery life - I figured we would see this from optimized software (which would be what kicks the battery life up and probably what can be credited now for the battery life it currently has.)
bigger screen - that admittedly was an ill thought expectation
3D - it's the future, it's here, it's not implausible that a tablet be 3D. If anything, it's MORE plausible given that a single person tends to watch movies on these things, and it's far easier to deliver a rich 3D experience when one viewing angle is considered.
HD facetime might actually be on the ipad3, maybe I spoke too soon. Same with ipad mini, maybe it's still coming.