I'd add +2 db to guitars, bass and equalize the latter so it can live with the kickdrum more, take the vocals a bit panned to either side, and 2-3 db less. You're suffering from dry signal on the percussion, it's the curse of sampled drums. Familiar with NS_kit? I suggest it for metal. Good layer depth and everything bleeds to everything, which is exactly what you need for metal, not dry one-hit samples. Just make sure to punch up the kickdrum and snare in the eq if you use NS kit.
Are you happy with the lead guitar tone? Sounds a bit dry too, for my tastes. Might want to treble boost it and reverb it more. But that may just be me.
I haven't heard the original, so I don't know how faithful this is or how much you want it to be but I like it as a song. Sorry if I focus on home-production more than I should, but that area excites me more than Novembers Doom do.