As the truth has trickled out, I expect that the final history will say that Brady was railroaded by a corrupt clique running a multi-billion dollar industry - and survived! He will be the man who stood up to power, money, and corruption and took them down. The value to a future political career is immeasurably large, imho.
It's a story that plays across the political spectrum. On the right, it's the individual standing up for truth, justice, and the American way. On the left, it's a story of a union employee getting railroaded by management and fighting back to take them down and rebalance the power relationship between management and labor.
I'm sure that the whole thing has been a bad experience and Brady has suffered some short term setbacks, but the path has been paved for him to catapult beyond the NFL with a really compelling story.