There is no evidence to indicate he deviated from the actual required content of the course, only that his lecturing style deviated from what the department wanted. (This is indicated by the department having reviewed and approved his final, among other things).

Also, I'll repost what I said earlier: there is no evidence he gave out A's more freely than other professors.

The grade distribution for one of Coward's classes (16B) is available online for you to check: https://schedulebuilder.berkeley.edu/explore/courses/SP/2016.... It shows his class average was a B-, whereas most other professors around the year he taught had a B or B+ average.