What’s happening to Bones 4th season?

What is happening to Bones? It started out as a murder mystery with very clever tie-ins that only a bone expert could solve. It has now turned into a very strange bed-hopping soap opera where what they show us and what they tell us don't match.
They haven't just thrown out the laws of attraction book they've burned it to a cinder. Now it seems like the murder mystery part of the show is about five minutes and quite frankly the clues are pathetic. The other forty minutes is some weird sex thing that we are actually expected to believe. No mathematician on earth could solve that equation.