I have 1 or 2 days experience running tooth trips, so this is my opinion.
As the number of boats and divers going to the same spots every trip has increased over the past few years, the quantity and quality of teeth has decreased. That's just a fact of how popular the trips have become and dive operations running trips to where their customers want to go. Same as how things have changed in the Cooper and Venice over the years. Ever hear the old saying "You should have been here 5 years ago"?
If you have questions about my credentials/experience about running tooth trips, ask your friend, Steve Mischew(we just spoke by phone a couple of days ago), or some others who've been toothing for awhile.