Having read the writers defense of the last season I can understand where they were going with showing the characters moving on with these subplots but the execution fell flat.
Masuka they rightly pointed out was extremely sexist so to rectify this they give him a daughter, the one woman he can't hit on (after his mother obviously and I don't recall a sister ever mentioned either). So she makes him more mature by literally making it impossible for him to be sexist to. It's the easy way out. There is no effort there for Masuka to mature.
Quinn is where...? He dumped Batista's sister, lost Deb. Has lost pretty much every woman he was close to and even got denied killing Saxon who indirectly killed Deb. He was passed over for the sargent's position and now he's just supposed to move on with his life? In what direction? Does he give into his own dark inclinations or is he going to perservere and become the cop and man he was trying to become for Deb?
Batista at least has his position and the bar he owns. He's got his sister and his life more together than we first saw him. Still a mediocre detective and a good guy but we've got an idea he'll be fine.
Hannah and Harrison are going to be living in Argentina and hopefully move on with their lives past the deaths they've suffered through. Especially Harrison who nearly got his own Dexter treatment when his mother was murdered in front of him. Hannah hopefully will be able to see and direct him from any Dark Passengers that arise.
Everyone else is either dead or of so little consequence we didn't get any glimpse of their future.
I agree.
I didn't like what they did with Masuka. I mean, he's a pervert. He's weird. It's why he's funny. I think any endeavor to have him mature is a mistake, and considering he's probably at an age where, if he hasn't matured by now...chances are he never will. Him meeting a woman whose as kinky and perverted as he is, and him just getting married is probably something that would have worked out better for me. You get a kind of maturity that I guess people might want, without diluting a key part of the character. Him being the pervy weirdo he is.
Pretty much everyone else is just kinda...forgotten by the end, really. We did't get any sense of "life moves on", or anything. They kind of left everything on hold with people like Batista and Quinn having to deal with what happened to Deb, and now Dex. I really would have expected a monologue from Dexter, as we're seeing these people from his "cover" life moving on. Either winding up in better places or worse places than before.
Like, seeing Quinn doing drugs off a stripper's body only to wind up dead for being a dirty cop again mixed up with the wrong people. He was clearly devastated by what happened to Deb. Aside from Dexter, Quinn was probably the most affected by it because there was alot of hope, and promise, in the future for him with her. Other things, like Batista maybe climbing the ladder some more, etc.
Elway wound up being a more important character than I would have anticipated, during the season, and by the end they seem to just go out of their way to ignore his existence and what they've built upon with him this season.
They've always seemed to struggle with the supporting characters on this series, so I guess it's no surprise that they continued to this season and at the finale.