I tend to get a lot of thinking about this stuff done on vacation. Thanks to all those who've offered suggestions and feedback so far!
Some reworking, a few new units added and some other tweaks. Chaos Squats weren't popular, so have been replaced. New PDF
I have some special characters sketched out that should see the light of day in the next revision. Currently planning on a Slaaneshi Cult Leader with some special corruption/deception powers, a nasty Khornate Mutant Warlord like a cyber-shaggoth, a sneaky Tzeentchian Traitor Officer with some redeployment abilities and telepathic orders, a Nurgle Astartes Lord zombie master, a Deacon upgrade and a special character Stalk Tank.
If you have the time to look it over, I'd appreciate your thoughts here or over at The Codex Project!