Not sure why you think VMware is disabling the USB WiFi Network Adapter, however for what it's worth I've had no problems in the past using a USB WiFi Network Adapter in a Windows Guest under VMware Fusion.
Have a look at: Troubleshooting USB device connection and functionality in a Fusion virtual machine
Have a look at: Troubleshooting USB devices using USB quirks in Fusion
If all else fails you may want to provide support information and maybe one of us or a VMware employee might see something to help resolve the issue... To help figure out what is what, the best way to provide comprehensive diagnostic information is to use the "Collect Support Information" command from the VMware Fusion (menu bar)> Help > Collect Support Information and then attach the .tgz file it created on your Desktop to a reply post.