Darkfall Unholy Wars first discussed the issue. Warriors in the game were just too good, meaning that the class meant as the easiest to first pick up was also the easiest to absolutely crush your enemies with. So the team stepped back, examined the problem, and put together a comprehensive set of changes meant to make all of the game's roles more appealing.
The three major changes put into effect were an increase to damage mitigation for non-Warrior armors, more normalized stats for every role, and a slight reduction in Warrior armor against the relevant damage from specialized damage types. The net effect should be that weaker classes now stay up longer and can deal more damage to Warriors, allowing more skilled players to pull ahead in battle. For more details including revamps to the wobble mechanics and individual ability tweaks, take a look at the full list of balance changes.
[Thanks to Jane for the tip!]