imho - the possibility to keep both clan as well as omni characters (and neutrals for that sake) is AO's big flaw. I had a lot more fun in the beginning, and you know why ? Because I felt like an omni and was getting into the role. That doesn't mean i would have to roleplay through my teeth - but I did in a bigger way play the role of an omni atrox enforcer then what i do now. The thing was... The clans was a mistery to me - I had never been there nor spoken to one. What I find today is that a lot of the people i meet have characters on both sides.. So HOW are they going to get sucked into hatred to one side ? I would love if your whole "family" of characters needed to be on one side instead. By this.. spying would actually make sence - as you can clearly see : now it isn't. If there are future warefforts (and I hope there is) that requires intelligence... Why bother trying to be clever when you can just create a lvl 1 clanner.
I do understand why you would want it open - to let people try a little of this and a little of that : but as long as the two sides have their own benefits there is a bigger prize in forcing people to _really_ side. Maybe you would want to give people a chance to defect at some crucial points ? lvl 15, 50 and 100 perhaps ? And then make that choice final ?
I am not going to get involved with a guild, because of the time and devotion it often requires - but i have a feeling I will by this actually miss out on everything around the rebels/omni conflict.
just my 2 cents.