I just gave this one a listen, and there were several things that stuck out to me.
The voice has a hollow sound to it, and is pretty sibilant in several places. I don't know if that's the way the original track sounds or if it's your EQ choices. It just has a strange tone to it, which I didn't find pleasant. The harmonies at the end could be higher.
The guitar solo doesn't "blend" with the rest of the track. I think it's several dB too strong.
Those would be the first things I would try to address.