Now that JD has been back in Columbus for a few years it's pretty obvious he has a large input. Look at what Columbus did when he was brought in. Whether someone wants to argue pro or con, that's one thing. But it's pretty clear now the sort of direction he has. He went to the BJs and followed a similar blueprint.
When they brought him back they were coming off a shortened season where they finished 4th to last in the league. They had made the playoffs 4 consecutive years up until then. The following season after JD was brought in they didn't make a ton of moves in terms of free agents or trades. There really wasn't much cap space. They had just acquired Laine for PLD and gave him big money. They swapped Atkinson for Voracek. He carried a big price tag. They signed Elvis Merzlikins to that 5 year +5M per deal after only ever playing 33 games at the most in a season... thats the guy who requested a trade not too long ago, and their GM flat out said no one is trading for that contract
. So they had some money on the books.
Then they miss the playoffs again that year (21-22). The following off-season they have some cap space, that's where they really spend. And thats an apparent theme for JD. He isnt shy about spending. They sign Johnny Hockey (RIP) for a boatload of money at almost 30 years old. Very similar to the Panarin signing. Except this time, Johnny really wasn't performing up to the contract. They made that silly signing of Gudbranson, paying him 4 million a year. This isn't hindsight either, many people were skeptical about all these moves at the time they were made. So they miss the playoffs yet again (22-23). At this point you kinda figure they're rebuilding. But, the following summer they go out and trade away a 1st and a 2nd round pick for Provorov.... not all that dissimilar from the Tuba acquisition. (That pick turned out to be 1 spot ahead of our boy Gabe Perreault). Again, JD & Co go out and sign another ~30 year old, Severson to that 8 year +6M per contract.
If someone wants to argue the merit, for or against some of the moves, sure. I think there have been some good and some bad. But it's obvious when looking at both organizations' timelines that JD has had his fingerprints all over them.