Thank Partners, Not Delta
Delta just shows the availability that its partners make available. Also, Delta's online booking calendar is doing a much better job of showing the ACTUAL availability.
I've been looking at Australia and South Africa awards on both KVS and Delta for January 2016.
1. I have noticed among VA/VS/KL/KE some crazy good availability like four (or more) in biz and seven (or more) in coach (+CS4, +YS7)
2. What KVS shows is actually bookable on Delta (Delta's website is fixed?!)
3. Availability on Delta's own metal is the usual rare and scattered +1 or +2.