2.3 Beta on OSX 10.10 Public Beta 6
 

My first impression with 2.3 Beta on OSX 10.10 Public Beta 6: It works even more better than the 2.2 Version. I'm using one Display with Displaylink Adapter with USB and one display with Mini Display Port connection.

Official Changelog 2.3 beta:

This release delivers the following improvements
* 4K resolutions support
* DL-5xxx support
* DL-3950 support
* New embedded firmware upgrade mechanism improving first connect user experience. Visible from future releases.
* Support for a single DisplayLink screen on OS X 10.10
- More screens can be connected but with limitations due to OS issues. See section H for details
* Bug fixes and compatibility improvements for all products

Disagree
 

I feel as though the performance on my DisplayLink-connected monitor has been significantly reduced. I'm using an Anker USB 3.0 Dock on the latest Yosemite beta (Beta 6), with a 1080p display connected using DVI. I have another display connected using Apple's Thunderbolt/Mini DisplayPort connector, which (naturally) works flawlessly.

Moving objects around the screen is incredibly slow, as is showing/hiding the dock, invoking Launchpad, or bringing up Mission Control. Windows on the DisplayLink-connected monitor also exhibit strange artifacts in the corners (top left, top right, bottom left, and bottom right).

Please address these issues, since it makes working with multiple displays very difficult.