I'm going to say you shouldn't take Gario's statements to heart on this.
If Rozovian wants to write in parallel fifths there's nothing wrong with it. And there is nothing "always" wrong with it, nor does contrary motion make anything "always" sound better.
Take this to heart though: If it sounds good, it doesn't matter what it's doing.
Also the ambiguity that Gario speaks of is pointless, tonality isn't completely necessary in this type of music, nor does open fifths imply other keys/tonalities.
None of the parts in this bothered me on a dissonance level either.
Gario, try some twentieth century music...rather then common practice stuff ;P the kind of thinking you're getting at really doesn't fit in with this type of music...he's not writing something that's immitating Bach or Palestrina here.
Back on topic: nice wip, production doesn't feel bad, and i'm digging the arrangement. my advice would be add more stuff to the melody that you're not going to find in the original, not just rhythmic riffs on the original melody.