I believe people need to have a definitive idea of what they want in a contract before a TA is presented. Don't wait for external forces to shape your opinion. If this means writing down section by section what you expect and revisiting your expectations when the TA is presented, then so be it.
Wanted or not, we are going to hear all kinds of opinions. Mine being an example here. I hope that we can filter out the noise, remember what we gave in the past, and make a rational decision about our future based on fact and not suppositions.