I've read through most of the thread up to this point, and see that most people that are posting seem to think the powers aren't that great. I can't really say, seeing as I haven't gotten any of them yet.
I am not a number cruncher. As long as a power works, deals damage and looks fairly decent, I'm happy. What I wanted to comment on was the story-line for Sirocco's arc.
Kudos to writers. Seriously, this is one of the most engaging and interesting arcs I've done since the arc in Mercy where you learn Ghost Widow's origin. The in-fighting between the factions, the talks with Arbiter Daos (sp?) that show even the 4 signature villains aren't trusted and the characterization of Sirocco are all excellently done. Oh, and running into a few of the Korean signature heroes was an unexpected and very cool addition.
All in all, I am enjoying the story immensely and however the actual powers work, I will not feel it was a waste of time getting them. Once again, great job writers/devs. Great job.