It would be nice if your were given a list of the existing class lines. You choose 3 lines. You would then get a name from the game based on what 3 skill lines you chose.
Example: I pick lighting line from sorc, destruction from DK and some other attack spell attack line from another class. The game might title my class Evocator.
It would be like Oblivion in a way. Of course just like Oblivion, you would still have access to all the other non class skill lines.
There are 21 trees a player can have at the moment. 3 of those trees are the class trees. So, even if there was some combo of three that was more powerful than the rest, as unlikely as that is, the other 18 would balance them out. Because everyone get's those 18 other trees.
Moreover, it is still way early in beta, so the balance would be tested for months.
If you consider that 3 out of 21 is only 7% of the total character, it would be hard to believe this could be unbalanced.
Skill trees for one character:
Race 1
Class 3
Weapons 6
Mage school 1
Fighter school 1
Faction tree 1
PvP tree 3
Armors 3
Emperor 1
Vamp/were 1
What do you guys think?