Definitely disappointing, since even the fight scenes which were the bright spots of the show early on in the end couldn't salvage the feeling of lost potential and mask the flailing of Kida's writing.
Well, now we know who was really behind Hibiki's superb first half.
Shiraishi Shunya is a great actor and I hope he finds success in the future like Suda, Shu and Fukushi have in the past three years. I think it's a great time for rider actors once again.
Nagase Tasuku was the worst secondary rider actor I've seen in awhile though. Maybe it was the writing, maybe it was Nagase himself but wow, we've had some epic secondary rider moments in the past (even if Ryuusei reused the revenge plot from Terui) but Beast literally had nothing going for him. Probably because Kida didn't really care for him though.
The show didn't really have an emotional core, which is something you'd expect from a series that was focused around saving people from despair and "hope", which is an old schtick that when done right isn't bad at all. I didn't really any moments where I went "Wow! Now that is why I watch Robot Karate Bugmen fight people in rubber suits!". It didn't wow me or keep me entertained at all.