Agreed. What might have been lacking in further developing this stadium beyond it's initial state form 1974 is an overall vision how the stadium could be made basically twice as large, and incorporate new facilities and amenities. That is showed in the stands that are different from each other and also do not really connect well to each other. Just like Old Trafford has this to a certain extend.
And without a fanatic and enthusiastic crowd no stadium in the world will have a great atmosphere to play in, no matter how beautiful and good the basic design of the stadium is.