[Daikaijuman54]

The Ex-Aid Armor looks cool... That's about it.

To be honest, while I don't think this arc was particularly bad, it doesn't stand out to me as much. I liked seeing Uuru's (Weure? Uolu? Whatever!) Time Majin, The Ex-Aid Armor, especially the neat little detail of the "Hit!" effects being in Katakana, as is Zi-O's motif, or that he has Gashacon Smasher fists, but nothing I have much to talk about here.

As for the Rider Erasure thing. It's as you say, I don't really like it much, nor does it make sense for Brave to be erased. Sure, you could chock it up as "Sougo inherits the powers of all the Riders, connected or otherwise," but that's still going to have problems down the road. I get they didn't want people to assume "then one of the other Riders could fill in," and yet even that doesn't work, especially for shows where the central protagonist is relevant to the plot.

Sorry I don't have much to say about this arc but given how long it's been since I saw Zi-O, and how little this arc stands out to me, there's not much I can bring up. But on another note, I love the design scheme for the Ridewatches, which are very clever and aesthetically pleasing, with some great sound effects. I also really love the Zikuu Driver and how it spins for the transformation, I don't know why, but I love it.