WIPL-D Benchmark
Most fastest CAD for metal antenna while I am using it in a few years ago. But it becomes inefficiency while with dielectric bodies.
For the GUI, I think WIPL-D doesn't have any improvement. Export & Import features for industrical fabrication?
Also, I don't know the mesh engineer in the lastest version. Can it mesh the whole body automatically near the feed?
Can it handle the microstrip printed elements for dxf file?
Depends on what kind of applications for your development, academic guys will use that software for their research