They have in house testers I am sure. My point still stands that PTS players thought Sorc might be a better healer than Templars, and both NB and Sorc were better at DPS, and every class was consensus better at tanking. Then they nerfed Templars hard. If they wanted to "fix" what actual players thought was fine, they should have made it a simple change so that Sta abilities give Sta back, and Mag abilities give Mag back (still destroying synergy builds) and lowering it to 2%/3% rather than 2%/4%. Then the problem which did not exist would be fixed, and Templars playable. The fact that PTS players say Templars are completely broken and not worth playing, and nothing has been done about it in weeks is very concerning. I tried about 15 times to log in and play, and it was just so bad I stopped each time after about 30 min.
In fact, the class everyone thought was OP was sorc, many think they are #1 at every single role.