I don't think this is necessarily the case with trade pacts; just the ones that get negotiated recently. Apart from everything above (and I will push the ISDS in particular), the three things that get me are Data Security (i.e. the fact that, from customers/employees to companies, there is to be none, remove any you have (EU, we're looking at you)), the migration of some of the more draconian copy"right" proceedings from the MPAA to the rest of the world, and the fact that these deals are negotiated in such secrecy that the intent is for the public to know what's in it the day after it's ratified by your government and not before.
Why? I'm sure it's because we're going to be happy with what's in it, and they want to give us a pleasant surprise for our birthday.
A minor concern is that it seems like the free flow of manufacturing is guaranteed, but the free flow of retail is "grey market" and a big no-no. So, you can use the fact that living is much cheaper in Bangladesh to make your products, but I can't use that fact to buy them there? Interesting.
PMI will probably happen - but it's another thing that will be fought against tooth and nail - because the big companies won't let the "hey, it's crap, but it's this or starve, right?" lever go very easily. It's just too useful (the so-called "gig economy" or "choose your hours and your clients" jobs will disappear save for those who actually want to gig, for instance, if their