I have been involved with the Buckeye Firearms Assoc (BFA) pistol caliber carbine project for a few years now. So I will attempt to give some of the perspective we have had in regards to the proposal.
The same calibers are already allowed to be used to hunt with, its merely the platform that is being singled out. In that way its the same as saying the difference between a bolt action .223 and a bushmaster is a hunting rifle and an assault weapon. They are not trying to include any new cartridges/calibers that are not already out there, just a new way to use them.
I personally think it would be a fun change of pace to not use my shotgun, or muzzy during the firearms season. In fact we are not asking for a new season either. Modern muzzleloaders, especially the smokeless ones easily are more accurate at distance and much more powerful as are some of the more modern shotgun sabot loads than any of the calibers in a pistol caliber carbine so no increased effectiveness. We are also proposing to maintain the 3 shot limit even though the ODNR's rationale is actually pretty weak with regards to why they changed.
Why then? One answer is why not? Another answer is to a reloader, you can practice a lot more with those calibers to become proficient than you can with a shotgun shooting slugs. Also, you can reload those as weak or as hot as the caliber will allow which could potentially make them much more new hunter/youth hunter friendly than other options. I know that I will probably start my son out with a reduced load in a a muzzleloader but if PCC were an option I would definitely look into that also.
I do think it could marginally increase hunter involvement which could impact hunters numbers. However I don't see it being a large impact over time, just as pistol hunters are not a huge impact in reference to the entire firearms season.
I don't believe that survey monkey is being done by BFA but I could be wrong. I know the last I heard the ODNR was open to the idea but concerned about hunter/landowner relations because they are afraid misinformation could lead to landowners thinking that the ODNR was opening up "all rifle calibers" and hunters would lose access. The ODNR also stated that BFA had to do a survey to prove otherwise before they would go further with the project. I know that we are looking into the impact it had in Indiana, as they just allowed Pistol caliber carbines only a season or two ago.