True. It has use for getting people away from you as well. All also true, but in 1.5 seconds of casting Aimed shot, or while channeling speed shot you're open to being interrupted, stunned, charged and stabbed in the face, etc. Which is why in any MMO you go to you'll find that Instant and Near Instant casts are preferred, and that any MMO's with heavy PvP elements (such as PvP specific talent trees) will focus on reductions of cast time and mobility retention.
I'm not saying it's not a good/useful ability even in PvP, but it probably shouldn't be your go to one in PvP because it's more designed around PvE functionality.
That is exactly how I suggested it be used. Though I'd say waiting for the energy to recharge is optional, particularly with the added in cover energy recharge speed.
I was saying use flourish to detonate the charge. I apologize for the lack of clarity. It's because I don't really keep track of names.
I could point out the icons, though!
That burst should finish someone off or very nearly do so, and leave you with quite a bit of energy left over at the end. You'll have popped your cool downs, yes, but that's what bursting does.
I mean, in PvE yeah. You want to do steady DPS, but that's never been the goal in a PvP situation where you're just going to end up getting killed soon anyway so being careful with energy isn't really worth it.