Quick Reminder!
I am going to be a lot less active here, and this is the last Kamen Rider series I'll be posting episode discussions for. Thanks for the ride, everyone. 
First, my thoughts on the final episode... I haven't felt this retcon'd since I played Sonic 2006! They basically took an idea from Decade, destruction becomes creation (I am pretty sure it's based on the actual Big Bang Theory, not the TV show with the same name), and ran with it. In my opinion, this episode does it better than what Decade did. Because while everything is reset, Tsukyomi's reality and Sougo's reality were merged into one world, and killed-off characters were revived with a new chance at life (it might even mean that Schwarz was revived, but as a character that isn't evil anymore).
But the episode isn't perfect by any means. I just don't feel like Zi-O's power is limited to destruction and creation, especially in that order. Tsukyomi's double-double cross was dumb, and she is extremely lucky it worked out in any kind of way. I'm also very confused about how this ending is at all tied to the Oma Zi-O we saw at the beginning of the series. He's still a complete mystery to me; I still don't understand why future Sougo went evil, nor why Tsukuyomi and Geiz were resistance fighters.
And I could be sad that the ending I was hoping for didn't happen, but... We still have one more Zi-O movie to go, maybe another after that for all we know. If Zi-O really is going the route of Decade, then I image a future movie will probably give another ending to Zi-O's story. I just can't imagine they'd end it this way without trying to restore the history of the previous Riders. (Unless that's exactly what happened in this finale, and the A.R.'s separating once again was suppose to symbolize that, which would be kind of a cop-out.)
And now my thoughts about the Zi-O series as a whole... At first, I had no problem with the crazy writing. It might have been all over the place, but I was quick to adapt and figure out why everything was happening the way it was. For the most part, the show's premise was pretty well approachable, and I wasn't as lost as other people watching along.
However, the later half really jumped the shark when the writers decided to make it more like Decade. It didn't need to be more like Decade, the show was fine with its own identity. There was all ready a lot to draw from, a lot of potential that could have been used to tell a different, even better story. I'm not hating on this show, but I think they didn't needed to pour on the Decade influence this hard.
In the end, all I can say is that this series has really shown me how crossovers in tokusatsu franchises should be handled...
Whenever Super Sentai has a crossover, either between two teams or multiple teams, they usually keep it fairly ambiguous. They don't often go into the how-and-why those teams are crossing over. They don't usually try to bring in multiverse theory or any kind of logic into it. It happens just because. And I feel like for Kamen Rider, that really should be the direction they go with.
As Decade and other fictional media has shown us, multiverse principle is all ready complicated enough as it is. Top that off with time travel, time manipulation, time altering, and time destruction, and what do you get? An unnecessarily convoluted mess that makes plenty of people rightfully upset. If you don't want to be part of the "turn your brain off to enjoy it" crowd, you'd need a lot of notes and supplemental material just to make sense of it all.
When the reason for a crossover is left open and ambiguous, it might be a little annoying, but it's a lot harder to hate it. The narrative reasons for why it's happening are usually answered through fan speculation and head canon. And it's a lot harder to get mad at your own imagination, especially when that speculation isn't official anyways. By being ambiguous, fans can put their own theories behind it and be perfectly happy with whatever they want to believe. And those that don't care will just enjoy the ride without having to worry about a flawed narrative in the first place. If Sentai can do crossovers better, then Kamen Rider would be much better off taking a page from their book.
(Sorry for the long post, everyone. Didn't mean to write an essay.
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I know the summary was from official site but it was really off, like Sougo was not calm at all, he was obviously full of anger.
Actually, I cut and paste the description from Wikipedia. I make these discussion threads before watching the episode, and since I can't make a custom description without seeing the episode first, copying from Wikipedia is easier and faster. Don't blame me, blame the editor.
