Fellow programmer Dan who's recently been working on providing the defrag documentation online made an attempt at merging the dfengine features into ioq3. It may be worth a try if you miss features from one or the other, although (as of now) it requires compiling the ioq3 source code.
Homepage: http://atdan.net/q213n7
Subversion : http://atdan.net/svn/qlient/trunk