ok. I listened through my philips-cans last night, but now I'm listening through M-Audio Audiophile 2496 - Mackie 1604vlz pro - Tannoy Reveal Active..
About the mono thing... ok.. 11 o'clock, and 2 o'clock.. sure, but that's about how wide it gets.. nothing inherently wrong with that, but there's quite a lot going on in this song..
ok, 'severely lacking highs and lows' might be a sloppy comment.. Let's just say there are muddy lows and low mids, and the mids and highs (those left after mp3-compression) are lifeless.. Add to this there's a LOT of noise going on. I don't know if the problem is tracking, mixing or 'enhancing', but seriously.. this sounds like a 56kbps mp3.
I don't mean to be a rude asshole. It's a good, well executed song, but the mix just doesn't cut it, and it's in the clinic for feedback, and these are my 2 cents.