I understand that you are at the mercy of providers and the fares/ZUJ engine was not under your control. But as others have pointed out, this is a major loss in functionality for KVS.
I just spent a couple hours, unsuccessfully, trying to do what would have taken 20 min tops in the past with KVS. Fares TVN is ok for coach fares, but completely missed business fares for my searches.
I just wanted to avoid paying $7k for a short notice flight to europe in business class and was willing to fly anywhere west coast to anywhere in N europe. I gave up on KVS and used ITA to "needle in the haystack" search to find some better deals and ultimately wound up finding an AF Z fare that has a 5 day advance purchase for around $2500. Neither of the KVS fare tools seem to pull that up.
I am not sure what else is out there for you to tap into, but that lost functionality is critical to me.