I think his poor last game for Porto at the Portuguese Cup final where he was basically full responsible for the defensive collapse might have changed your judgement.He was better than what they had but he didn't stand out at all and Porto fans weren't unhappy to see him leave. Maybe I'm being harsh but it's surreal to me to watch him start games for a team with the defensive reputation of Atletico after having seen him being just ok at a lower level for years. Similar thoughts about Herrera too, he was good for Porto but noone thought he was good enough to make this jump and keep starting for a team like Atletico.
Felipe does have the characteristics that a coach like Simeone would like but it's still a big step down to have either him or Savic as starters imo.
Despite being a cnut on the pitch, he is a very solid CB, but he needs a faster partner. He's a great CB to deal with direct passing to the strikers, because he's very aggressive. His 17/18 season was terrific.