As for Chase himself, he may seem to be less of a fit than others because we are fixating on the notion that Tua needs guys who get great separation to be successful.
Now it is true that as an unseasoned rookie he struggled to "throw guys open" but that does not mean he will never develop the confidence to do so.
And Chase is the #1 WR in this Draft for a reason.
I would be happy if the Fins added any of the top 3 WR or Pitts as I think they all would impact the team, but make no mistake Chase is going to be a stud.