Hey Stephen,
The pd-gui-rewrite effort has been entirely folded into Miller's pure-data.git and is included in the 0.43 release. The dev/PdGuiRewrite page is there for historical interest. You can find out more about one big feature of this effort in the GUI Plugins section of the docs:
The look and feel of Pd is a very personal issue, so now we can customize it a lot using GUI plugins. For example, I think that straight cords are much more readable than bezier curved cords. As for bugs, please do make bug reports, you can get to the bug report form from the Help menu in Pd.
.hc
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Man has survived hitherto because he was too ignorant to know how to realize his wishes. Now that he can realize them, he must either change them, or perish. -William Carlos Williams