The moment I read in the balance notes that HS will give barrier to allies I knew it was a possible winner over Desert Empowerment for support scourge. I tested that it affected allies through shades, and it does, which means it also affects up to 10 allies. Did T4 fracs and wing 2 on my support scourge with this trait and it was great! Granted the timing requires some getting used to and if you're used to spamming shades for condi clear and the small barrier from Desert Empowerment, you will need to adjust your timing. BUT, I found this to be ultimately superior.
I did notice some bugs in certain situations where only 1 ally is given barrier regardless if there are more allies and they're standing next to you and in your shade. However, this was not an issue in raids, more in open world.