Maybe I'm wrong, but I had the impression that in SL they changed it and all 12 classes are available from the start.
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Higher skill ceiling with similar performance to Demonic. If Blizzard wants it to compete with Demonic, they must change it to perform much better that Demonic at its highest.
That how it's suposed to work: harder to play, good performance / easier to play, mediocre performance. You mess with that and you end with builds noone plays.