Of course it would be negotiated in secrecy. How else do you expect something to get done? Every political player will get facts out of context and make his rhetoric out of it, sprinkling emotions and indignation to rally up clueless people, in order to build up his image or get a political favor. Now imagine this happening in every country and mass media amplifying it.

Negotiators would have NO room to negotiate. Parliaments have to ratify and have appropriate time to get themselves familiar with the matter. Stop drinking the kool aid.