50k is good temporary solution in my opinion..
But a capacity between 58-65k should be our target (but than Italian football needs to be back like it was ten years ago).. And if they expand the stadium, they should give the visitors only a place in the top of a corner, like in Amsterdam. Now it's a shame when you see Juve playing in a full house and than when you see the corner of the visitors, 2/3 empty (in 12/19 home games)