I don't have any qualms with anything because almost all the tracks don't link the original (I remember reading it wasn't like that before but after deliberation this was the best course of action). Concerning the track you linked, I was unfamiliar with the original so I went and listened to that (and other permutations of the theme that seem to exist). If I had to guess, a major aspect of why it wasn't accepted must have had to do with the composition effort. I don't think its wrong to simplify things but the original seems to have a lot more going in terms of writing and thematic structure. A lot of that appears lost here. What we get instead is a pretty straight forward lukewarm hard rock take with some pretty middling tonality too.
I'm sure there are folks who do enjoy it but I think, even as hobbyists, the bar for creativity is much higher at OCR than is displayed in this piece. I would take that a step further personally and say that goes especially for anything pure rock. I think its both a blessing and a curse of a long lived community that continually has new contributions. As more and more people try to bring their take on it, the skill levels displayed and the attempts at creation become more, well, skillful and creative. I wasn't here in 2009 but I was listening to OC Remixes and I think maybe this wouldn't have met the bar then and I would say it definitely wouldn't meet it now.
That being said, I'm not a judge, I'm also technically your junior here as a fellow ReMixer and while I respectfully disagree, I can also see why maybe you'd feel the way you do about this song. Maybe the thread is here somewhere and I can read their thoughts.
edit: found the thread and (years later lol) I seem to have echoed some of the judges thoughts. Very much simplified and a bit (in the most neutral sense of the word) uninspired in terms of creativity. They loved the big ol' riffs though.