OK - I dove deep on this and revamped several sections. I also had a sit-down with a talented audio engineer friend who gave me some pointers in how to improve both the mix clarity and some of the production choices - she pointed me toward some plugins, virtual instruments, and vocal layering tricks that I've tried.
Major changes:
- Layered a sub-kick sample into the drum kit to beef up the low-end of the SSD kick.
- Add a lot more variation to drum hit velocities to accentuate dynamics
- Added more (or more complete) pauses
- Added some harmony lines or quiet doubled vocals in the harder-hitting passages (sort of cheated here, using melodyne to create harmony lines out of by B-stock of vocal takes).
- Stripped back some of the layered instruments that were muddying up a few passages. In particular, pulled back on the clean guitar going into verse 2.
- Better saturation plugin on bass to get some nice harmonics
- Switched to an opto compressor for vocals (UAD LA2A)
- Threw a FET compressor on the drum bus
- EQ fixes to some problem frequencies that remained.
- Slate digital fresh air plugin used on acoustic, vox, cymbals, and snare to add some more top end.