He already inherited a good team and had a true #1C in Stamkos to build around.
It was more about Hedman than Stamkos. Yzerman was able to draft forwards and the team won a cup with Stamkos playing like 4 minutes of playoff hockey. The most important parts of those teams were Hedman (inherited), Kucherov, Point, and Vasilevskiy.
He still needs cornerstone pieces, no doubt, and the wings haven't been quite bad enough to get them, and it's getting tougher to find Brayden Points in the 3rd round. But I think what we're seeing here is, the top-3 regular season teams in the Atlantic are all looking like they're going to take steps backward. So the Wings are going to be competing with the Sabers and Sens to snag one of those spots.
So the Wings are gonna try to start really competing for a playoff spot, but I don't think anyone, including Yzerman, believes these are key components of a contender. This is more about surrounding your guys with better players. Like, late stage transitional pieces (Filppula, Salo, Carle, B. Boyle). I think we will see a competitive Wings team next year, but true contention still requires some key, very hard to find, pieces.