That isn't correct, seawolf. Content won't be available to corporate bookers just because their TMC uses a GDS that is "ready."

The GDS has to be ready - fully ready - to replace GDS functionality. The GDSs have ticket issuing down in NDC. Certification and capabilities to manage a ticket are entirely different.
The online booking tool has to be able to receive NDC content. Right now, Concur can accept some of this content via non-GDS aggregators like TravelFusion, which is clunky as heck.
Finally, the TMC needs to be able to track and manage tickets. Right now, they can only manage tickets using non-GDS third-party platforms (TF Desktop and Farelogix), which they don't want to use ... and largely don't do.

All three have to work together. And, right now, they don't. You're also ignoring the fact that removing content from corporate tools is likely AA's intent.