There is something called the "Combinator" which allows you to basically make your own custom rack with in Reason. Very cool concept. Then they added the "Mastering Suite" which gives you a little more control over dynamics. Its not Native Waves caliber but its a nice addition. Those are the main things, they also improved the browser, hardware integration, and a mini 6 channel mixer. If you like 2.5 you will love 3.0. No I dont work for Propellerhead ha ha.