Stalled Series #1: the Chemical Garden trilogy

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This is a new feature on my blog, as I have discovered that there are a bunch of series I have read the first one or two books in but have not finished. (I'm not the only one, right?) I'd like to decide for sure if I really want to complete some of these series or not, so I'm turning to you, faithful readers, for your advice.

First up on the chopping block: the Chemical Garden trilogy by Lauren DeStefano.

I've had mixed feelings about the Chemical Garden trilogy right from book 1, as you can tell from my review of Wither. The writing style made it difficult for me to connect to Rhine, and I found Gabriel very boring. In the sequel Fever, I had some issues with inaccuracies/implausibilities in the scientific basis of the world-building.

So why am I even considering finishing the trilogy?

Well, there's just one more book, and I admit I'm a little curious to see how it all wraps up. I thought the "sister wives" premise was an interesting one that was well-executed. And I found Linden to be a far more complex and intriguing character than Gabriel.

So, what I need to know is, is it worth it to read the final book Sever? Does it provide a gripping conclusion to the series? Is it at least somewhat plausible? Will fans of Linden be pleased with his character development? Or should I just let the series stall forever?

Advise me, please!