I think I see where the confusion is happening. I'm not sure you understand what Wright believes Paul to mean by "works of Torah". You think it means "becoming morally acceptable before God on judgment day just as obeying conscience would have for its aim becoming morally acceptable before God on judgment day" or legalism. This is not what Wright believes it to mean. So anytime you accuse Wright, it is an undue criticism.
No, I believe that is Paul's point - "becoming morally acceptable before God on judgment day just as obeying conscience" and that is what Wright is repudiating and refusing to acknowledge as you correctly suggest by saying:
So much of Wright's thinking is governed by his study of 2nd temple Judaism. His assessment is that they were not so much legalists but nomists. Though it is oversimplistic, you might differentiate the 2 as keeping Torah is not a means to "get in" (legalism) but rather to "stay in" or be Jewish (nomism). Wright believes that Paul sees the fatal flaw of Judaism is that they found confidence in their ethnic flesh and even worse turned their noses to the Gentiles, something totally against the Arbahamic covenant. Law keeping for Jews was a badge of honor saying, "This is how Jewish I am!" This is the problem Wright believes Paul is addressing. That Jews and now Jewish Christians with the same Old Covenant mindset (like the Pharisees in Acts 15) want to force Gentiles Christians into the same nomistic mindset of law-keeping in order to keep covenant status as the people of God.
However, that is not Paul's point at all, although I am sure it is included in Paul's more extensive view of "works." By distorting Paul's view of "works" which is comprehensive of EVERYTHING derived from man, Wright has distorted the Biblical view of Justification by placing a restriction on the comprehensive meaning of "works" by Paul.