The northern map meta seems easy enough to work with once you get the special action skill with a handful of people using it together.
The southern map meta seems REALLY overbalanced, seeing as you have to guard each node from attack. Unfortunately it would appear that the scaling is way too harsh, as having any more than 5 people at a node to protect it makes the mobs super-level, often 3 levels above. Not being able to effect repairs yourself, and having a key piece of a few different achievements gated behind the event's success, seeing it fail over and over again for 6 hours tends to rub someone's nerves a little raw. What is the proper makeup of a group to get the event done, and how many people are supposed to be there for it, if not the whole map, or even a small squad?