It's not possible to instantly be great. You have to be good at some point and build on that. I don't know where we got this idea that you can skip good on the way to being great.
I guess it depends on how you define great. The Redskins in 2023 went 4-13, then in 2024 went 12-5 and made it to the NFC Championship. The Saints did the same in their 2005 and 2006 seasons.
I know some think it was just because of the QB's, but it wasn't. That's an oversimplification in my opinion. Both teams had the most important change a team can have, they both turned things around when they got much better coaching staff than the previous year. There are several other examples of how upgrading has lead to a big, year one turn around for a team.
Fingers crossed that Moore and his staff are about to do the same for the Saints. I'll consider year one a success if they have a winning record, because that would be at least a four game improvement over last year. That would be a nearly 100% improvement and something really good to build on.