I'm sure Pep thought Kalvin could deputise for Rodri, or even play alongside him.
Perhaps Pep was blinded by Bielsa's (relatively) successful style of football with Leeds ?
He has extolled the virtues of Bielsa, who is an interesting character.
Leeds certainly initially played enterprising, attacking football that entertained. Phillips was a crucial part of this.
Kalvin was also respected by Gareth Southgate and a key part of his midfield.
Every team make mistakes with signatures.
City under Pep, have done better than most...