class difference!

[Loopy]

Bloodlust and Berserker (req for Bloodlust) cost a metric ton of might runes. And if you want to be a true master of rage you need the other rage abilities, which will improve damage by up to 60%, give you a 60% chance to use rage twice a turn, and give you a ton of rage. Those happen to be on the opposite end of the tree. Other classes aren't going to have a chance at filling the entire tree in, so they will need to decide between starting with rage or gaining and using it much more efficiently. And TBH I think Bloodlust is pretty bad in comparison, chugging a rage potion is just as good and the other end of the tree has some awesome things.

In the end I would much prefer no unique skills at all, letting rune availability determine what you can get. The first unique skill of each tree is pretty meh except Edda vs undead, and the second unique would be damn hard to reach even if it was available.