GOOD RULES
(1) unassigned, but limited capital ships; the rule that said you could only have so many DN, BCH, CV flown at one time for each side; I think this better represented the capital ship command structure that people were looking for in the GW series
(2) capital ship cannot fly together rule - this rule stopped players from taking the two biggest ships for their side and just clearing out areas; simple rule, but very needed in my opinion
(3) LOS(line of supply), but only for placing bases, or assaulting bases or planets; as long as you have a LOS AT THE TIME of placing the base or assault you're good to go; we all know that you may not be able to maintain the LOS after the assault/base placement
(4) Disengagment rule - to me the crux of this rule is to give the smaller fleets (such as Gorn) an opportunity to beat back a larger fleet from a particular hex for a period of time so as to work on building that hex's DV back up; obviously, if the front is big enough with that opponent with more pilots they will punch through your defenses somewhere else, but at least you will be able to hold one spot if you assign all your pilots there (assuming you can run off the your opponent's ships)
(4a) if a disengagment rule is used, the time penalty SHOULD NEVER be more than 30 minutes
(4b) whether you are forced to disengage or your ship is destroyed, the time penalty SHOULD BE THE SAME
(5) limited hull class areas - whether it's the nebula hexes or just an area designated by the server admins, I always liked the idea of having a capital ship free zone
BAD RULES
(1) personally, I never liked the CnC assigned ships of the GW series. I certainly understood the idea behind it, but I think their are other ways we can represent a limited amount of "big metal" on any one front without limiting who flys those ships. (see liked rule 1); my biggest problem with this rule - most capital ships were assigned to players who did not play enough, or were not available during important assaults (or defense) during the servers.
(2) limited shiplists - yeah, I know that some servers have been setup so that droners and carriers weren't over-used, but can't we limit the amount of those ships used just like we do for the capital ships. I just don't like it when admins bow the pressure of certain members of our community to do away with certain ships they can't stand. To me ship variety is important to what type of missions I am doing. I say again, if there are certain ships that are overused (and considered cheesy in nature) LIMIT THE NUMBER of those ships on the server at any one time, but please don't eliminate them altogether. All you do is create a very stagnant shiplist and, for me, lose my interest. Sorry, but KCW was the perfect example of this.
That's it for now.