So I actually did not think it was a very good season at all, and the only thing that made it more interesting was the ending. That doesn't mean I liked the ending (I'm torn, more on that in a minute), but I found this mystery incredibly BORING and simplistic, despite being overstuffed with red herrings and unnecessary characters. In fact, when I hit the halfway point after episode 4, I was complaining to friends that it was so dull and I liked the movie better.
I don't understand why they went with THIS plot which barely affected Veronica and had very little personal stakes (besides the ending shocker), when they already had (in the first book) a spring break murders story hat ultimately led to SUPER PERSONAL CONSEQUENCES for Veronica's own life. That would have been so much more compelling and satisfying to see play out, instead of this dumb real estate/famewhore bullshit storyline, the most egregious part of which was the two Mexican hitman who literally could've wandered right out of a Fargo season. They felt incredibly out-of-place to me.
This particular plot, though lackluster, could've even worked a lot better if the setup had been different and we'd met Matty first by Wallace being her teacher, and -- though i can't believe I'm saying this -- if Dick was a bigger part of the plot leading us to Big Dick's shenanigans. The Kane memorial high school thing could've been a much better vehicle/location for a bombing storyline about haves vs. have nots (and they could've had more Principal Clemmons!). They had so many ways they could've made it so much better and more interesting and more personal for Veronica. The Weevil/Veronica scenes were some of my favorite in the season, and it's a pity there were only a few. I would've really liked a whole/longer arc of that.
As for Logan dying, I don't hate it entirely. I was never a huge LoVe fan, though you can't deny the chemistry, but this season was also constructed to pretty much show sexual chemistry was really all they had. They didn't communicate well, weren't ever on the same page, and Veronica seemed incredibly bored by normal!Logan. I actually thought that stuff was pretty smart and insightful and rightfully should have lead to a breakup. (Plus, I always liked Leo and I liked that she actually got to LAUGH and have fun with Leo. I mean if you want to give her a healthy relationship...) And then they decided to one-up it and make it super tragic "noir" by killing him off instead, so the "No I really do love you after all!" revelation and the wedding just ended up being red herrings to surprise you with the killing. A shame. They could've given Jason Dohring some better, more interesting material to play before getting rid of him. (And they wasted Mary McDonnell--which is really a crime.)
But like someone above said, if the choice was they had to kill Keith or kill Logan so Veronica could have an unhappy noir ending. I'm glad it wasn't Keith. I can handwave that "oh false alarm, I'm good!" ending just because I really didn't want Keith to have dementia, retire, or die. That being said, I'm not sure more tragedy for Veronica was the best choice. It had a real "how many lumps is the universe gonna give this girl?" feel to it. I saw folks online complaining that, like many other male showrunners, RT seems to think women can't be tough unless they have a lot of trauma. That's a shame, though it is in keeping with the PI/noir genre they desperately want this to be considered a part of. But I would like to see a Veronica who is badass just because she's confident and intelligent and wily, and not because she's bitter and hardened.
All of that complaining aside, I'm intrigued as to what a S5 looks like. If it's an anthology, with her and just a whole new cast, I agree it won't be as compelling as Neptune and the gang there was. But they kind of painted themselves into a corner with making Veronica either a sad sack or a hypocrite who goes back to the hometown she hates. So I see why they feel they want her to move on. Her ties (except for with Keith) seem well and truly cut. She was not interested in Wallace's boring settled life, she fought with Weevil, Logan's dead, Dad's doing well. Time to move on. (I can't imagine Enrico wouldn't somehow be a part of any S5 even in a recurring capacity. We have to find out who is girlfriend is too.)