Nyquist is going to be really good, you can see the skills. Babcock really likes him as well, the fact the Wings were struggling against a top team isn't a slight against Nyquist, you just go back to what you know works. He'll be a fixture in the top 6 for a long time.
There are other physical, solidly defensive teams out there.
In general, yes. But no one else currently plays and executes a system like the Blues IMO. The Rangers are a physical and defensive team, and Nyquist played a very good game against them playing in the top 6.