He was productive in Juventus for 3 seasons, but Juve probably didn't like the ridicule Edu Aguirre, Ancelotti and Ronaldo were doing. Besides, some sources say Ronaldo's agent was offering his signing for €25M to a premiere league team.
I think Atlético, besides signing Vlahović, should take Ronaldo for €25M, if they thought to s out more than €50M for Griezmann and take on his horrible long term contract. They will be able to recoup most of the €25M transferring Ronaldo after a season to PSG or MLS.
Suárez delivered the league, Ronaldo will deliver the first Champions.