Depends on wheter you believe in multi-country trade pacts or not. The failure of the Doha Round showed further emphasized that they have to be
negotiated in secret, but of course are made public when that's finished and it's time to ratify them or not.
Experience shows they have to be voted up or down without allowing each of the 535 Congresscritters a change to amend it, i.e. force a renegotiation with the other pact members, which won't happen since they've already taken political hits once it became public.
If neither of these process details are acceptable to you, then multi-country trade pacts are not acceptable to you, and a lot of potential compromises where e.g. country A makes a concession that helps country B, which makes one which helps country C, which makes one which helps country A, when no (new) bilateral concessions are possible won't happen.
This of course says nothing about the content of any particular agreement, but that's a separate issue from process.
