Vocals should do the job now...how were they tracked? Just to know where the limits are of how far one could push them, processingwise?
Also since there's no spot in that clip without backing vocals I'm not sure if they will work on there own. Along with the backings they sit ok now I think.
+1 on the orchestra, I also think it's really loud. But I'm not familiar with that kind of metal, so maybe it has to be that way.
Solo needs some work still, that's true.
But again man, the instruments sit along really nice, and the general vibe of the mix totally fits the music!