Many of your concerns remind me of why I rolled an alt account a few months back. I let myself believe that your rank determines the expectations others require that you must meet, be it perfect decision making or perfect builds. To me, having op+ means you have the ability to help others obtain their potential and be able to provide a decent building environment for guests. If things get overwhelming, or are no longer fun atm, just build!
There is no need to worry about whatever promotions you've made in the past. The guidelines were proposed just a couple days ago, and what's the worst that could happen? Simply a slight reduction in build quality on the build/adv maps. As for any Fcraft commands, just ask around. I remember it took me close to 30 minutes to troubleshoot how to create a new level (with fellow minecrafters snickering at me in skype lol)
PetePorty pretty much summed up the rest of your concerns
