I agree that the dispute settlement process needs reforming, but I trust that Trump doesn't expect us to accept the jurisdiction of American courts or tribunals. As the softwood lumber disputes prove, American courts and tribunals are very heavily biased in favour of American businesses.; Canada lost almost every softwood lumber case that was dealt with by an American tribunal and won almost every case that was heard by a neutral international tribunal. 

My view is that NAFTA should have a permanent dispute resolution court, with judges approved by all three governments, appointed for fixed, non-renewable terms of great enough length to insulate against short term political turmoil.  That court should have original jurisdiction over all trade disputes that NAFTA applies to; national tribunals like the American CCITT should be cut out of the process altogether.