In some points, yes. He would've approved or disapprove anythin' in that show. AAAANNNNDDD... His presence could've made all of those ex-KR actors to return for action.
The actors do not care who is in charge of the show. What they care about is the paycheque. Sure, there are some who loved working with the show. But they ain't gonna do it for free, and it is Toei who decides if they want to have them back or not. It is not exactly cheap to hire them, and most of them have moved on to do other work
Don't forget that Toei actually WANTED to bring back the original Heisei Riders for the Decade movie, but were unable to manage it due to different reasons, which is why we got the Showa/Heisei team-up.
Its not like we always got old actors back in Ishinomori's time either. Stronger was the last series to show all the old actors together, after that, the cameos of old actors started to become less.
Fujioka only did voice-acting from Sky-Rider and onwards. In ZX we got 3-4 old actors returning, while old sound recordings were used for most of the other Riders.
In RX we got none of the old actors back. We got some horrible voice actors who didn't even come close to the originals.
When it comes to hiring actors, time and money always play the biggest role.