If Moore, as claimed, didn't assign his rights to TPL, PTSC/Moore are in a very strong position to renegotiate.

unless ownership of that catalog is not theirs [TPL]. Did they do the work on behalf of PTSC/Moore, or on their own initiative?

From the MA:

From the termination of the Commercialization Agreement until one year from the date thereof, Patriot shall not contact or enter into discussions or negotiations with, or enter into license agreements, settlement agreements, or other similar agreements with respect to the MSD Patents, or pursue any litigation or other dispute resolution involving claims related to the MSD Patents with regard to any potential licensee with whom TPL is engaged in active negotiations at the time of the termination of the Commercialization Agreement and identified in writing by TPL within five (5) days after such termination ("Active Potential Licensees").

How would the above exerpt play out?