Lukazan -- it's a wide array of issues, but to me it's:
Saka/Odegaard have their partnership interrupted by playing Partey at RB. Ben White had a great season and fantastic partnership with Saka, and that is clearly missing.
Havertz to me looks one part confused and one part lackadaisical. His role appears to be focused on off ball runs to complement Odegaard (as our creator) but he isn't playing with any conviction. Contrast him to what Ramsey offered, and you see how square of a peg he is.