Stiglitz on TPP--Does He Have any Economic Arguments?

At Project Syndicate, Joseph Stiglitz and Adam Hersh have a critique of TPP.  I suppose it was optimistic of me to expect to see concerns about lost jobs or trade diversion--topics that could be illuminated by someone with Stiglitz' enormous skill.  But the critiques were more in the realm of negotiations and law, and I found them weak indeed.  First, almost nonsensically, the piece argues that because negotiations are having trouble persuading some governments to reduce their management of trade, that the agreement is "an agreement to manage its members trade".  In what way does the failure to liberalize all trade make this agreement an agreement that is, in the authors' words "not about 'free' trade?"  Second, neither the authors nor I seem to know whether the increments to IP protection proposed will be welfare-enhancing or not.  They say the arguments that these rights promote research are weak.  OK, but this seems a tepid critique.  Third, the authors argue that the TPP represents "managed trade" for tobacco companies.  This is an incorrect use of the term "managed trade."  But more importantly, it actually looks like there are serious proposals to curtail the availability of ISDS to tobacco companies.  The authors repeat the canard that the TPP ISDS will provide rights to sue for "diminished expected profitability."  These are feeble critiques indeed, and aside from the comments on the state of our ignorance regarding the welfare effects of enhanced IP rights, have little to do with economics.