In terms of the "fuzzy" text problem, this is actually subject to personal preference and the technical specifications of your monitor. Many people (myself included) actually don't have any problems with the "current" font rendering. I can agree it's sort
of blurry, but it's readable (better than earlier WPF font rendering) and I actually enjoy the smoother aesthetics. At the same time, I can see why some people can find a problem with it.
In terms of a "solution", it's actually not that straight forward. Scott Hanselman and Pete Brown reached out to me to work on this issue specifically. TextFormattingMode and TextRenderingMode were one of the first things I tried and it really didn't have
any positive effect. To cut a long story short, it actually turns out enabling transparency on the application disables ClearType font rendering application-wide.
We required transparency because of the custom chrome drop shadow we've implemented so currently we need to solve that issue to solve this fonts issue.
Rest assured though, we're looking into this and will seek a solution to satisfy everyone.
Wild idea, and it sounds impossible to me even typing it, but I shall...
What about having two windows/forms open, one transparent for the drop shadow, the other opaque, and tie the position of the two windows/forms to each other, so you get the same kind of effect?