Chrome Prince, how ya going buddy,

I agree totally with your view on eliminating false favourites by use of the "class" factor. In fact, I would strongly recommend, as an initial filter, to eliminate any pre-post favourite rising in class and field strength. This should improve your winning percentage markedly. Remember, as a percentage punter, like me, if you can eliminate a false(or media hyped) favourite you can then create a dutch-book and back numerous other starters.
It is definitely "food for thought."

Cheers.