I'm not sure Semien gets a long term deal. If he gets one, it better not be with the Tigers.
I think Correa and Seager get career ending contracts. Story probably does as well. And by career ending, I'm talking through age 36/37. They may have a handful of seasons afterwards, but certainly these contracts will use up the rest of their prime and go into the downsides of their career curves.
Semien, Baez, and Taylor are going to be interesting cases. Three or four year deals? I guess that gets Taylor to 35, so maybe he is kind of in the previous paragraph, but he's already 31 and hasn't really established himself as an everyday SS. Looking at Baez again, and his offense might look better than I think his reputation suggests, but that probably depends upon how one weighs OBP.
Simmons, Gavlis, and Iglesias (I guess we can toss the last two into the conversation) are going to be year-to-year, maybe a year with an option of some sort.