The non-frobbed highlight should be applied on shiny valuables only. Could be enabled by a spawn arg.
Sometimes i miss some valuables hidden in plain sight because they do not look as shiny in TDM as in other games. Extra shinyness would surely make that special goods stand out a bit more.
That new frob could indeed be more reliably than the vanilla one. A test map containing frobable stuff with different diffuse and specular maps in different lighting conditions would indeed be great.