New things i'm excited about in no particular order.
1) Structured Spellcasting
Give up the ability to set your spellcasting limit with Edge and Reagents, and you can't use reckless spellcasting anymore. In turn you get -1 Drain on all spellcasting tests. Combine that with Mentor's Mask and a fetish for some serious Drain reduction. Hello Force 9+ indirect combat spells.

2) Paradigm Shift
I've always wanted a mechanical way to change traditions. Now I got one! This also opens up Insect and Toxic traditions for all kinds of fun and joy...
3) Spirit Expansion: Shedim
Ever wanted to play a necromancer? Now you can. All you need to do is to negotiate with a Master Shedim to learn how. Easy, right?
4) Mentor's Mask
Hate Drain? Me too. Here's an option for less drain at the cost of more easily noticeable magic.