Diablo III Interview, Skill Trees Being Removed

During a phone interview with Diablo III lead designer Jay Wilson over the weekend, DiabloFans managed to score quite a bit of new info about the game, including confirmation that the series' skill trees are most likely going to be replaced with "a purely skill-based system".
DiabloFans: On the topic of the Monk, can you tell us if the skill trees have been named yet? So far they're listed as "Unnamed Skill Tree 1 - 3". Can we expect to see any more of his skills unveiled soon along with his female counterpart? Also, can tell me a little bit more about the new skill system?

Jay Wilson: In regards to the female counterpart, she'll be released soon. As far as exact dates go, I really can't talk much about them. A little news about the Skill Tree system should actually go up on our Twitter page pretty soon. About that, we've decided to remove the tree-type architecture and we are moving into a purely skill-based system. This new system is still in the development stages and if it does not work, we still have plenty of options to fall back on. Right now, we're just trying different things and getting a feel for the few ideas in regards to the skill system that we have going on right now. It differs from the World of Warcraft/Diablo II type hierarchical styles and is more of a skill pool/path than a tree per se.

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DiabloFans: What are the differences in the difficulty levels in Diablo III other than just monsters doing more damage? ie: What reason will people have to play through these modes after having already beaten the main story of the game on an easier difficulty setting?

Jay Wilson: We haven't really gotten into the difficulty settings a lot; we're still just working on the core content for the game at this point. The primary reason as to why a player would want to progress through the game, through the several difficulties would be for more of a challenge. There will be also better item customization, for example a Level 100 character in a higher difficulty would see and wear items that a Level 30 character would not have a chance at seeing in the lower difficulty. Said items will also look and feel completely different whereas in Diablo II a lot of times you just had a remodel of the same old items with different names.