Here's the current wording in the (edited) PDF, based on some customer feedback...I definitely look forward to any commentary you might have to better reconcile the wording with our intent.
Provoking an Attack of Opportunity
Two kinds of actions can provoke attacks of opportunity: moving out of a threatened area, and performing certain distracting actions within a threatened area.
Hi, Wulf. I'm back. Didn't have an opportunity to reply, yesterday. My apologies.
I like this part. It's very clear.
Moving: Engaging with an opponent usually does not provoke an attack of opportunity; disengaging with an opponent usually does. Moving into an opponent’s threatened area engages you with that opponent; moving out of that opponent’s threatened area disengages you from that opponent (unless that opponent is still within your own threatened area). If any part of your movement takes you into an opponent’s threatened area, and you do not end your movement with that opponent in your own threatened area, you provoke an attack of opportunity.
This part is also very good. When I read it the other night, I actually thought it was saying the opposite of what I now see it to say. And, it's practically ideal for me, I think.
As long as you end your movement while still threatening any opponents that threatened you before you moved, you don't provoke attacks of opportunity from movement. There are still some wrinkles that I can see coming up at the game table, but I think those can be easily resolved. You may want to clarify that moving through a threatend area when you aren't threatening that opponent provokes and AoO from that opponent (I'm thinking about reach weapons and big creatures, here).
Trailblazer encourages combatants to engage with the enemy and the rules for Attacks of Opportunity reflect that philosophy.
I think that is a good philosophy to have. The attacks of opportunity rules for movement in 3.5 often left my players afraid to move. With these rules in place, movement isn't discouraged, so long as as the PC's are engaging the enemy.
The only change that I think I'd make is that I'd allow someone the opportunity to attempt an attack of opportunity whenever a moving opponent disengages (ceases to threaten) them. I'd do this just so that the timing of the AoO isn't delayed until the mover has completed their movement.
Other than that, this looks very good. Get in there and engage the opponent! Move if you want, just keep your weapons trained on them!
