Indeed, we did not manage to address all of the reported issues, and we are deeply sorry for this. Nevertheless, we are ready to offer you a custom build where the second problem you reported is fixed. Please, open a formal support ticket and we will send you the build which takes care of the dock bug.
As to the performance issues, this is an ongoing task, as we noted initially. We did some dock improvements for this release, although not in the direction you have reported. Our goal has always been to improve performance and this is exactly what we are going to do in the future as well. For the first service pack we plan to address some grid scrolling issues, as well as improve the docking manager. The service pack is scheduled to be released within the next 4 weeks.
We apologize for the time it takes to get these problems out of the way.