I am a happy owner of both EZ Drummer 2 and Superior Drummer 2. Although I would love to lean how to process drums and dial in the exact sound I want but that is not my original reason for buying superior; I bought it so I could get a midi lean function so I could use my expanded e-kit (nothing too fancy, a DTX582 with 2 extra toms and 2 extra symbols). So my problem is the opposite of yours, I want midi learn in EZ Drummer. I still like playing with superior but I would rather be able to use my EZX completely in EZ Drummer. I do feel that after I upgraded, I got some much new needed features but I also lost something too. I don't mind using both tools. I don't mind buying both the EZX and the SDX version. All I want to do it play my whole kit in EZ drummer 2. I own EZ Drummer 2, Superior Drummer 2, Addictive Drums 2, and BDF3 and EZ Drummer 2 is the only one that can't do it. Crazy thing it is still my favorite of all of them but that one limitation forces me to use something I don't like as much when I want a bigger kit.
Sorry for hijacking your thread to rant, I do feel your pain, If your playing drums and not programming them Ez Drummer 2 is a much better experience than anything else out there (unless you modified your e-kit from stock)!