^ Exactly my thoughts on that aspect of the show as well. But the show was doing so well in season two and then it kind of fizzled halfway through season three. I used to be left thinking after the episodes and like speedymeg25 said, now the show turns off and that's it.
I do think they should go that extra step beyond the cases, but they also need to find a happy-medium. In season four there was a bit too much drama, and in season five there isn't much but the cases. I think the writers are trying too much to be the hottest and most unique show on television, that the high-profile status has caused it to fall short on the substance department. All I see is great cinematography and not a lot to back it up character/case-wise. Others may not agree, but that's how I feel.
If the show wasn't flashly and hyped up with cars, women, parties, alcohol and sex, I'm afraid the show wouldn't have half as much appeal to a lot of their audience. (And it's too bad that sex sells) They need to start pulling in the viewers (like many of us) who watch for the great mystery and the characters who solve them, rather than a bunch of boobs and palm trees. If I wanted to see that, I'd tune into Baywatch.