I like Dante overall. He's adorable, charming, funny & has a great bod that we don't see nearly enough. But...Along with many of his father's more favorable qualities, he also appears to have inherited a couple of his less likeable characteristics as well.
First of all, like his father, he has the common sense of a tree stump. He adds 2 & 2 & gets 5. Supposedly, he's an experienced detective who's done undercover work before. Generally, cops research gangsters they'll be working to bust. They don't just read a rap sheet & hop into an undercover assignment. Which means he'd know a little something about Sonny & Jason as people before he came there. He'd know that Jason doesn't make mistakes & when he cleans up after himself or Sonny, it's flawless. The fact that Jason & Sonny have made mistakes in this should signal to him that it wasn't either one of them that whacked Claudia. It's obvious who killed her & why. I think even Lucky put the pieces together & he's not with S & J day in & day out like Dante. You can also see that Michael's been acting different since that night, which would be another piece he'd put in place if he was such a great detective.
The other negative trait he inherited is in both his mother's & father's family & that is stubborness. He's been told a million different ways by several people, including Ronnie (his boss, partner?) to get out of this investigation. Yet he stays, compromising his safety & his mother's as well & now, Lulu's. He refuses to acknowledge that too many people know who he really is. In real life (I know the writers hate to do these stories the way they'd play out in real life), Dante's superiors would yank him off the case because there is no way he can keep his cover. His mother, cousin & girlfriend all have close ties to Sonny & Johnny. And even with all his "connections", Jax wouldn't be able to keep Dante on this case because of all the many ways this could go bad.
Once again, the writers are taking a character that started out with a lot of potential & dumbing him down, making him just another keystone kop without a clue. Depressing.