Mostly agree!
I'd be absolutely stunned if Zion ever got legitimately close to Lebron's level of creation, and that's no insult to Zion: plenty of all-time NBA talents have been nowhere close to Lebron as a creator. I have him as a top 5 passer of all time, as do many others, and a lot of people who don't still have him top 10. Similarly, the more ambitious you are as a passer the more turnovers you get but the more high-leverage situations you create: there's a reason guys like Nash and Magic were high turnover players, and it wasn't cause they were being stupid or anything: they were just trying super ambitious passes that worse playmakers would never try.
Still, I agree that Zion's passing and creation has room to grow from here, and it wouldn't shock me if he ended up having a handful of those 25/7/7 seasons that Lebron is so famous for by the time all is said and done.
I also agree that we've seen defensive improvement. Game 1 this season he was flat bad, and while he's not uniformly good now (there are certainly still black marks on his defense and areas to fix) he's gone from 'awful' to just 'mostly fine' with occasional flashes of 'very good'. Hopefully that improves and by the end of his rookie deal we're talking about Zion as a legitimate plus on defense, a real 2 way player.