It needs to not be a BIG issue it needs to be a COLOSSAL issue. Any trade deal of this magnitude must be suspect on its secrecy alone. Labor issues, environmental issues, country sovereignty issues, and giant monopoly and concentration of corporate powers are all on the line with this beast.
I heavily question rhetoric by our own president that TPP/TTIP/TISA will level the trade playing field and boost exports. Labor costs are the number one reason our jobs are fleeting outside our borders. The only way export trade can be increased, leveled, and become fair is by raising wages in cheap wage countries to competitive levels with the US OR lowering the US wages and standard of living.
NAFTA has directly helped to produce a US international trade deficit in goods and services that has increased to $44.5 billion in June 2016 from $41.0 billion in May. I can not see companies using cheap labor in Mexico, China , etc. advocating higher labor wages in those countries thus volunteering to lower their own profits. If anything I see TPP as driving down American wages further.
I believe this is going to be the beginning of global leveling of a standard of living. This would mean huge profits for protected Global companies and low level wages for all. It would only sustain continuous "low economic class" consumer buying but never upward advancement beyond that class. Any fight for upward advancement would be fought off by a Global governance; any small business development would be crushed. Fights on say labor and environmental crimes would be silenced by loss of profit provisions in place to protect corporate abuses.
To me, at its very core, this trade deal seems to be a blow against the exceptional nature of American democracy. Replacing a dream of self sustained democratic countries across the Globe who would emulate the success of a once thriving US economy with a completely level lower wage consumer based Globe where a small handful not only reap the benefits but write the governing force to protect their own interests.