I have emailed Dan at Flanders about the possibility of vectorscope gain expansion and he sounded receptive to the idea. If anybody else sees this as useful, please post here or contact Flanders Scientific.
There is a competitor that offers up to 5X gain expansion, albeit at twice the price. Vectorscope gain is useful for white balance, black balance, white shading and using a DSC Labs Chroma Du Monde chart for proper color points.
The other useful feature would be for the waveform to have a flat(chroma) capability, but this sounds like it is problematic according to Dan.