Interesting. The exact same build on Parallels V8 with Win7 Pro has no issue at all. If not native, is some kid of compatibility mode introduced by the hypervisor?
Since Windows 7 does not natively support USB 3.0 then the only logical conclusion is that however Parallels Desktop for Mac virtualizes its USB they also provide the necessary drivers.
I also tried VirtualBox but that is a joke, in my opinion.
Certainly everyone is entitled to ones own opinion, doesn't me it worth anything! 
While the VirtualBox GUI is not as polished and or refined as VMware Fusion (or Parallels) nonetheless I found it extremely useful with Windows 8 since it was not supported on my older MacBook Pro under VMware Fusion and therefore ran it quite well in VirtualBox. I just purchased a early 2013 MacBook Pro with Retina Display (15.4/2.8/16GB/768GB Flash storage) and installed all 3 Type 2 Hypervisors as they all have their uses. Although I do try to favor VMware Fusion for easier compatibility with the other VMware Products I use. However that will never stop me from using all 3 as/when needed. I look at it just like the screw drivers I have in my physical tool box, one size does not fit all and sometimes one just needs a cheep one to bang around and VirtualBox fill that need. 
Since this configuration does not work with Fuson and does work with Parallels, is this a bug/oversight on VMware's part?
Since Microsoft Windows 7 does not natively support USB 3.0 it cannot be consider a bug however if Parallels can provide drivers then I'd consider it an oversight and shortcoming of VMware with VMware Fusion.