The clean guitar might have a bit too much low mids to achieve the sound you're looking for. I'd suggest you re-eq the cymbals or use another cymbals library, as they sound a bit harsh, poke in volume at weird places, and essentially drag the mix down. The guitar isn't perfect, but as of yet it's probably better not to touch it too much. The lead guitars could be retracked though, the playing is a bit soulless. The bass drum and snare are also a bit weak: try referencing albums you like and mixing and matching bass drum and snare samples in order to imitate the sounds you enjoy. I think that once the cymbals are cleared up, you'll find the mix breathes a lot more and you'll be able to have a better sounding bass. A bit of distortion and clank would go a long way in making the mix a bit fuller.