Awareness is still a great combo for Bulwark, so that's great for dungeons.

Shirk has two uses I can think of: 1, making tank swaps easier. OT Vokes, MT Shirk. 2, adding aggro to MT in trials with no swap. OT can Shirk a bunch of hate over periodically so the MT needs less aggro combo. Now it doesn't seem worth it to use a slot in either case, but the meta hasn't developed yet, so I could be wrong there.