[Asheron’s Call 2] Turbine has redesigned the Hero levels in AC2 and has announced the new system.
It features things such as: making all classes solo friendly, new and improved passive skills, monsters rebalanced and XP increased, new focus system, more class variety, hero credits, original hero active skills revised, more new hero skills, and even more skills called “perks”.
Read more about it here. Also note the completely new website.