I’ve got to admit that that result is a lot clearer than I thought. It is possible that the fares team at TfL who will have helped to create the results for that request may now be looking at the outcome. Hopefully contacting your MP might increase the pressure to do something.
I’m still not convinced that they will create flows for the diversion route in the fares table, but they may look to make adjustments afterwards following a weekend when the diversion is in place. It may depend on how many of the overcharges were actually mitigated by reaching a cap anyway.
I’ve got to hand it to you for persevering with this issue.