Perhaps the most significant external change is that the win32k.sys device driver is now stable and is highly configurable. Many users now no longer need to use pe.exe to invoke Win32 programs. There is a new utility, win32kcc, the win32k control center. Win32K.sys features can be turned on and off as needed to suit special case programs. No rebooting is required.
Installation is now simpler.
Odin releases are now available in WarpIn WPI format. The WPI installation script for Odin can update config.sys and initialize the Odin .ini files for you. These operations no longer need to be done manually. For the tweakers among us, the ZIP releases are still available. The Odin release now includes an auxiliary installation tool, Odininst.exe.