I haven't done the epics yet, so I can't say for sure, but I was able to complete the Helm's #### instance without even knowing about the trees or roles. I doubt you will need to get far into the trees to complete the epic. My guess is that they are there to give some progression for players who want to do everything in the epic battles.
Originally Posted by Whart
I do not love the bright sword for its sharpness, nor the arrow for its swiftness, nor the warrior for his glory. I love only that which they defend. ~ Faramir
Undo the U12 class changes. The trait trees were, are, and will always be a bad idea.
Maedhric 100 Captain, Nunion 93 Champion, Taraviel 85 Minstrel, etc...