For the drums to play brushes, select from these styles: 

• Jazz: Ballad Even
• Jazz: Ballad Melodic
• Jazz: Ballad Swing
• Jazz: Gypsy Jazz
• Jazz: Long Notes
• Jazz: Ballad Double Time Feel

Then remember to adjust your tempo.

Currently there are no [... to sticks/... to brushes] or Pop/Latin feels with brushes (or brush on snare).