The round will struggle without across the board support by the lever action manufacturers, and it's not clear Ruger is in a position to support it given we're not even seeing 30-30 336's yet. That's too bad. It's not a bad idea.
I grew up in Michigan when as a 14yo your entry to deer hunting was tolerating a 2-3/4" 12ga slug. Certainly not youth hunter friendly. I hunted my first season with a side-by-side Fox 12ga with a rifled slug in one barrel and buck in the other, then baled hay to afford a $120 Traditions ML which I killed at least 70 deer with.
Indiana took a different path, they stuck with the .358 restriction but got rid of the straight walled and substituted a 1.8" case length. This allowed WSM wildcats which were honest 500 yard guns (35 Whelen AI clones), and that was the beginning of the end. The legislature over-ruled the DNR and passed a bill allowing rifles, but since they weren't gun people it was a nonsensical law, so the DNR threw up their hands and opened it up to anything .243 and above on private land.
I understand the desire to restrict ballistics, and am glad it has progressed to allow straight wall rifles which open up much improved options for young hunters. I also understand arguments for opening it up further and acknowledge no hunters have been shot in Indiana under the looser laws, thought a number of houses and other buildings have been shot (most target shooting I believe, not hunting shots). I hunt a couple properties and my home property does have some concern for direction of shots and what is in the background...I'm going to try a 458 SOCOM subsonic with a suppressor, which is a far better option than shotgun slugs but wouldn't have been permitted under older laws.