Might as well throw in my two cents.
UA: I think these are good additions to the rules. I don't see the lack of concrete examples or such to be an issue; they're rather clearly meant to be guidelines rather than straightjackets, and since they're basically talking about forum culture -- something that becomes rather clear as one learns to navigate a site -- I think they're sufficient. I expect it will be a learning experience for the staff as well as the users, as we come to tentative agreement on what's okay and what's not, but I think it's a good rule of thumb overall.
PW: The problem with "don't be a dick" -- itself a very good policy -- is that some posters can be disruptive even if they're posting in earnest. They aren't trying to be dicks, and they aren't trolling, but their honest opinions nevertheless prove disruptive and drag things down for everyone.
I think anyone familiar with my recent posting history knows who I have in mind there. I guess the corollary to "don't be a dick" is "be productive!" That is to say, don't just air honest gripes, but rather try to move the discussion forward. It's easy to lose sight of this and fall back into old patterns
(I wouldn't know anything about that, not me, nosiree! ) but I think this is a goal we should aspire to regardless.
Stryker: Asking for concrete examples is not productive IMO. It gives a false sense of what's okay and what's not, and as NemZ noted the specifics vary from mod to mod (as they must). As another site I (used to) frequent put it, "We don't rule on hypotheticals." That's important -- it gives the staff leeway to call a spade a spade, even if it might not otherwise technically adhere to any given rule of thumb. And, as I noted above to Ursus, red/green text will help make the intent of the rule clear here, while also giving us a chance to learn and provide feedback. The rule isn't unilateral, so no need to get too worked up about it.
NemZ: On the topic of transparency, it would be helpful to let users know right away if a mod comment or decision is based on posting behavior that negatively affects other users. In the recent thread suggesting changes to posting habits in the Evangelion pictures thread it wasn't clear (to me at least) that the proposed change was based on actual problems users faced: to me it all sounded like a concrete change to a hypothetical problem. Once it became clear users were actually having problems my position shifted from "why are we talking about this?" to "wait, users are having problems? That's bad, we need to do something!" Tell us that up front! It may be obvious to you but on our end it looked like a mod request that came out of nowhere.