Personally, I thought it was more ergonomic, because it has a flatter profile, and requires less tilting back of the wrists to type on it. I find my hands in a much more natural position.
You got it. It's more ergonomic by definition because it gets your wrists in a straighter profile than any other Original Equipment Manufacturer (OEM) Apple keyboard. There ARE more ergonomic keyboards out there, but they are all after-market. No OEM ones are as wrist-flattening as the new Apple one, and therefore are not as ergonomic as the new Apple one.
It sounds like the OP is missing the tactile feel of pushing a spring-loaded key down onto it's contact. Have you looked at any of Matias' keyboards? They've got a great one called the Tactile Pro:
http://matias.ca/tactilepro2/index.php
It's probably got that feel that you've been missing. Just make sure you get some kind of wrist rest to reduce that upward angle (and get the wrist flat again).
The ultimate keyboard would be one that's flush with the surface of the desktop that the mouse is sitting on, and would be right next to the mouse. They keys would get pushed below the surface when pressed.