I do have to say that it does resemble EE2 quite a lot, but then so do most early-generation magic systems. I have the theory that most mod devs get all excited for their system of choice (essence, EMC, vis, EU, MJ), and decide on all the things that they can cajole it into doing. Then they start looking at how it plays with other things, and the changes that vanilla makes, and decide that the system is broken and needs a rewrite. Bring on Ars Magica 2!