I haven't ever seen anything from the first writers that say how it would have been if they had stayed on through the end. Something interesting to consider though: according to the Hibiki "Perfect Archive" books, the change happened at episode #30. Inoue penned every episode from #30 on except for #38 & 39, which were by another guy, who coincidentally is the writer for the Kamen Rider Kabuto movie. But also, the show's producer changed at the same time, with a different guy taking over from #30 on. I think that might have had an even bigger effect on the show than the writer change.
According to Wiki Japan: The first producer, Takadera Shigenori, who also was one of the producers on Black and Black RX, and then the chief producer on Kuuga and Hibiki (#1~29), retired earlier this year.
The second guy, Shirakura Shinichirou, was one producer for Kuuga and then chief producer of Agito, Ryuki, Faiz, Hibiki from #30~on, as well as Kabuto. He also did the Shin Kamen Rider video, and FIRSTy (which he cameos in.)