The test center patch is also attempting to balance its arsenal of weapons. “Feedback on equal damage across classes was mixed,” the developers noted. “The majority (only by a slim margin) disliked the change. However, many liked that it fixed some long-standing issues like one-shotting from full health. In PTS 2.1 we are trying to find a middle ground.”
There are other changes and tweaks, including alterations to base shields and how different weapons are classified. You can read the entire patch notes to get the full picture.