New Retro Synth, Clav, Organ, and Electric Piano instruments.
Bass Amp Designer and new stompboxes in Pedalboard.
Round robin sample support in EXS24.
Alternatives (integrated versioning).
Project packages - everything contained in one package instead of a folder (still supports folder structure if desired).
Autosave in the background.
I also suggest the major features that were removed be documented directly. Especially the fact that the 32-bit bridge is now gone.
2.4 GHz i5 MacBook Pro w/ 8GB RAM, 128GB SSD, 2TB FW800 7200RPM and 1TB FW400 7200RPM. Mac OS X 10.8.4, Logic 10.0.1. Focusrite Saffire PRO 24, Roland JUNO-Di, Yamaha HS50Ms, Sennheiser HD 518s.