So with the Black legion codex on it's way and according to some rumours just a minor change in FOC it got me thinking about the other 8 Chaos legions and what slight changes they could get in the FOC to make them more representable in terms of fluff. I'm not a fluff buff (oh hey, that rhymes) so I just know some basics on most legions.
A minor thing I would like to add in this kind of "wishlisting"; only models from the current GW Chaos space marines range. So Termies to troops might be fine. Asking for a totally new unit is not... because I doubt GW will put out new kits for supplemental codexes (for now).
Some might remember Chaos codex 3.5 where you could play any legion and it moved around the FOC a bit (Iron warriors with 4 heavy support and only 2 Fast attack)
Khorne; Cult marines both in Elite as well as Troops. Mandatory marks on cultists (if cultists are even an option). Maybe have Chosen cult marines.
Slaanesh; See Khorne
Nurgle; See Khorne
Tzeentch; See Khorne
Word Bearers; Dark Apostle as upgrade for Cultists. Or have Apostles as Elite choices. Fearless or Ld 10 Cultists mobs.. yikes.
Night lords; Raptors as troops? Bikes as troops?
Iron Warriors; I could say "More Obliterators"... not sure if that's the best idea, lol. Maybe move Havocs to Elite to make it more of a siege army with heavy weapons.
Alpha legion; Infiltrating cultists? Infiltrating marines?