If KC goes into a game determined to get 10 rebounds, he will get 10 rebounds.
Assists are more complex and dependent on others.
Assists might come easier next year for KC with more higher percentage in the paint scoring from Davis and Aytes and fewer 3 point shots. On the other hand, Fischer could launch enough shots to make up for the loss of Haws, Halford, Winder, Nixon and Andrus.