I did notice an improvement in the sound of the Subtractor too actually but not really with Thor... But then again I don't do much with Thor (definitely not to the same depth as you Exode!) mainly bass, low pads and mid range synths and I don't think low freq's are subject to much aliasing.
I am a bit concerned about the potential CPU hit. I'm running an AMD Quad Core with 4 gigs ram and I can quickly max things out ever since the introduction of RE's (not complaining, just saying...), so oversampling might tip things over the edge.