Cheers for the feedback, CJ. The low-end tweak is definitely the first thing on my mind at the moment. I recall doing a lot of drum/bass only bounces where it sounded sick, so I think the majority of the issues are coming from the rhythm guitar bottom end being a bit too prominent/cloudy. The issue there being if I neuter them too much, the groove-esque nu-metal riffs start to lose their nutsack.
VCC sounds very faithful to the consoles, IMO. At least to what I know of the 4k. My mixes start to get 'that thing' as soon as I start stacking VCC instances. The catch with that being is that I also get the elements of 'that thing' which I don't dig so much either. Too much saturation for modern metal mixing can destroy you, so you're always walking a tight rope using stuff like that. It also took me a long time to find a way to mix low-end while using VCC and still be happy with it. Traditionally my thing was always to carve the bass into a very small area, as clearly and tightly as I could. With VCC this changes, and you have to accept that there will always be a degree of smear and imperfection down there. The catch is in making it 'bend' correctly and pump in the right places so it sounds musical rather than muddy.
On the whole though I think using VCC adds a dimension and livelihood to mixes which they otherwise lack in a complete clean mixing environment. I would love to see them add 9k or AWS models for mixing low-end or cleaner stuff like RnB/Hip Hop.
Guitar amps were 6505+ with Winged Cs for rhythms and 6505 with JJs for leads. Both through Mesa Oversize 4x12.
