Something I've said quite a few times. I don't think it was only presentation--there were issues, though rarely do those issues intersect with any of the typical complaints--but presentation definitely was a big one. I think the problem was, it looked like a "user interface" because it was so crisp and brightly-colored.
Had it been presented in the "Renaissance-man sketchbook"/"Hermetic esoterica text" style, I think it would have been received very, very differently. Especially if slight effort were put into...not so much "obfuscation" per se, as making an active effort to imply a great commitment to high naturalism even if that implication is only skin deep.