So not so really zone instancing, just a subsystem to manage entry to specific zones based upon dynamic conditions. That doesn't sound so bad
The other thing I seem to recall was the importance of the average level in your adventure party. I cant remember all the "tiers" but there was a way to calculate how many ldon points you were going to get based on the average level of the group.. or was it that the average level of the group determined the levels of the mobs the zone loaded for you.. actually, i think that was what the average level of the group determined...
There was another calculation i recall we had figured out as players.. something along the lines of whoever was the highest level in the group got slightly more ldon points than the rest of us.. wish I could recall these numbers... I just vaguely remember thinking of them.