Griezmann to Barca makes a lot of sense, but of course I have been saying this for a while so I would say that. The idea that he, Dybala or Lemar would be a direct replacement for Coutinho is missing the point. Barca need to make a statement, I am not sure why Coutinho is that in their mind but the others I can see replacing Neymar in the team. Maybe they thought Coutinho would be easier to get.
Mahrez I would be a bit underwhelmed by, he has serious problems with his attitude imo, but if Jose trusts him I guess we will get to see.