Also it's a question of people's expectations going in - one person in the comments section of Cody's article said that while they didn't expect Correa, they expected them to be in on Cody Bellinger, Michael Brantley, Andrew Benintendi, etc. Despite the fact that Harris has continually stated that the need in the OF is for someone who bats right handed. Or JD Martinez who only makes sense in a world where Miguel Cabrera is put out to pasture.
The Tigers need bats, but the need doesn't mean they should be taking a scattershot approach and just signing anyone and everyone on the market - they still need to be discerning within those needs, focusing not just on production but who also makes sense based on platoon splits and the like.
The other part is that, again, the offseason isn't over yet. People hate hearing it, but there is still time left and it's hard to prejudge without knowing what it will look like when the cake comes out of the oven.