Sorry, I can't understand how anyone can be amazed with 2EQ comparing to any, even simple full-range calibration. 2EQ doesn't do anything below 1kHz, where it is needed the most. MCACC could also be quite different versions starting from doing nothing except level-distance detection and ending with full-range EQ, standing wave control and full-range phase control.
I'm not going to argue the merits (or lack thereof) of Audyssey 2EQ with you; I simply made a comparison between my Onkyo with 2EQ and my former Pioneer with MCACC. The difference is AMAZING. Whether that can be attibuted to various differences in the two receivers (such as power, amplier, etc.) or the different room corrections (Audyssey vs. MCACC), or a combination of the two, I'm don't know. What I do know is the system has never sounded better, period! Do I still wish I could have afforded the 818 with Audyssey MultiEQ XT32? You bet! Do I think it could sound better with the XT32? Yes again! But for what I was able to afford at this time, I'm one happy camper regarding the sound. There is a seamless blend between my SVS sub and my Cambridge Soundworks speakers and the bass is accurate and tight. Why shouldn't I be satisfied (all things considered)?