Tanking is a lot easier than it looks. Even using the AOE moves (Flash/Overpower/Unleashed) 2 or 3 times while pulling big is sufficient enough to hold hate, if decently geared. And in boss fights, there are more than enough tools to comfortably tank most fights outside of tank stance after the opener. Personally, I'd actually try tanking on a serious note and do it for a while before assigning blame or suggesting reworks to the job.
