How they should have ended Dexter

The first 4 seasons are fucking gold. In my opinion they should have had season 5 as the last season and have the story unfold as Quinn investigates Dexter and LeGuerta too probably as it would be rational that she listens to Quinn's theory that Dexter had something to do with the trinity killer. Then they would find actual evidence that Dexter is a serial killer at some point late in the season and then have the last few episodes be a tense manhunt for Dexter.

If they did this the series would be fantastic from beginning to end instead of dragging on for 3 more shit seasons.