Objective analysis is certainly an essential tool in understanding a score, but excessive attention to it can lead to academic and sterile piano playing. Because interpretation also includes intuitive and more subjective elements such emotional content, it must sometimes assume the role of a counterbalance in performance. Thus, objective analysis and intuitive subjectivity need to be integrated in a balanced way thereby assuring that the holistic approach will be successful. For example, in the music of Bach, because this great composer handed down scores with very sparse markings, in addition to playing statements and sequences, strettos, variations of ornaments, questions/answers, organ pedals, counterpoint, and fugue voice entrances, voice leading, etc., to make Bach's music come alive beyond those devices, the pianist, to be expressive, must call upon a measure of intuitive thinking to interpret the music more fully to broaden its context. Because Bach was improvisatory, he would expect no less. Similarly, in the Late Romantic music where the emotive elements of the music are quite obvious and most tempting, the pianist needs to set some boundaries through objective analysis to prevent the interpretation from becoming idiosyncratic or maudlin. This is a pulling in of the reins. Holistic thinking is the grand scheme and overview, but also requires a balance of analytical and intuitive thinking. If we can attain that, then we preserve the tradition of the "good old school" of pianism as you call it, that is playing in a manner always reflecting good taste.
thank you for your valuable and detailed thoughts! I have taken some time to look for some unknown words in the online-dictionary, because I wanted to understand all very well you have written. And I have to say I agree to all at hundred percent. I wish I could express all these right and true thoughts as well as you in English.
You are not only a true and thoughtful musician, but also very eloquent. I appreciate that very much. So, for me your words are not only valuable from a musical view, but also a good school of English.