• Process Optimization for Audio File to Viseme Lip Keys
• Motion Alignment for Props
• Euler Rotation Order

Process Optimization for Audio File to Viseme Lip Keys (akin to CT8)
Location: Animation > Facial > Create Script.
The results of the audio to lip sync differ slightly between iClone 7.2 and CT8.  From version 7.3 and onward, iClone's lip syncing will be more natural like CT8.

The example below features iClone 7.2 on the left and version 7.3 on the right:
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iClone 7.2 vs iClone 7.3

Motion Alignment for Props (Stringing together prop translation clips into one continuous motion)

New UI: timeline right-click context menu: Align
76% of original size (was 661x19) - Click to enlarge

An animated prop will pop back to its starting position when applied to the scene.  Which becomes problematic when multiple translation clips are applied to the same prop because the animation sequences become disjointed.  The new Align command in iClone 7.3 can string together prop translation clips into one fluid motion:

[ iClone 7.2 ]
76% of original size (was 661x19) - Click to enlarge

[ iClone 7.3 ] 
76% of original size (was 661x19) - Click to enlarge

Example content from Dragons Pack

Euler Rotation Order

New Menu > Animation > Rotation Order can be used to modify the euler rotational order of an object

76% of original size (was 661x19) - Click to enlarge

Since the release of  iClone 7.1 animation core enhancements, some rotational animations gave unexpected results.
This is due to limitations of Euler calculations where different rotational order can give different rotational results and sometimes cause gimbal lock (where the axes of the rotation will all of sudden flip). 
The option to change the rotational order is now available to overcome gimbal lock.
76% of original size (was 661x19) - Click to enlarge