Tried unsuccessfully to redeem for two CZ LAX-CAN-BKK awards later this year (October). Confirmed there was plenty of availability via EF and AF.com in business class but spoke to 3 Delta agents, all of whom appeared highly competent, and they reported seeing no seats available.
Got booked on CI instead on the same route with similar (slightly better) schedule, but was bummed they could not secure the CZ space that seemed to be available as I really do not like the CI J product very much. Are they blocking certain partner award space?