Thinking aloud, and attempting to bridge the various ideas that have been floated, howabout:
*Points. The first question is whether we stick at 400pts, move up to 500pts or maybe even go up to 750. I like the idea of 400pts because it keeps it fast, something that you can get an army together for in pretty quick time, and because it forces limits on what can be fielded. Then again, while it works well for my Guard army, my CSM, Nurgle and Salmanders would struggle to field much of any use at that level. Maybe the solution here would be to keep 400 as an ideal, but keep it open so that it could go up in increments to 750? (just like a standard game is 1.5k, but can go up to X). By keeping a cap at 750pts, CS retains a distinct flavour that is different from the 'standard' game and missions.
*HQ. The 400pt (or 500 or 750) limit combined with the wound rule would mean that uber-powerful HQs could not be fielded. Practically and fluff-wise, it would make perfect sense to field, for example, a 10-man CSM with the Aspiring Champion as the HQ. I also like the idea that PAGE suggested that your HQ should be the mini with the highest leadership score.
*3 Wounds to 2. Is there a way of including a 3 wound character, but amending their stats (and points) so that they have 2 points?
* HS & FA. The more the points creep up to 750pts (or even lower for my Guard) the possibility of bringing in some HS comes up. Is it possible that the 'less than 33 AV' rule would automatically rule out most HS anyway? I can't think of a single HS vehicle that would be allowed through on that, but of course there are also such units as Obliterators or Devastator Squads. Maybe the solution here would be to say no HS? In terms of FA, I can see that if we are ditching the organisation charts, upping the points and emphasising the fluff then FA would be even more central a part of each army. Could a case be made for fielding a completely FA army?
*200pts limit: I still think that this is overly restrictive, especially. if we are including troops and designated transport together.
So pulling all this together, I'm wondering whether the following is doable:
*Stick to 400pts where possible, but have the option of going up to 500 or 750pts
*Leave the HQ choice open, albeit with the various restrictions in place. You can either use a separate HQ choice or have part of your troop choice (i.e. the Aspiring Champion) as the HQ. I think the 'no unique characters' rule should stay, but is maybe also covered by the wound rule.
*Remove the suggested 200pts limit, esp. if we are potentially moving up to 750pts.
*No HS, tanks are already covered in the '33' rule, but a general 'no HS' rule would cover the rest.
*All FA? Is it possible to work out an 'all FA' list?
*Wounds. Is it also possible to work out a rule of thumb to work out how to make a 3-wound character into a 2-wound one?