Time was, I had to be careful of using Killing Spree because the boss/trash might have their back to a ledge or bridge or something... but that was it. Good for the odd laugh, but that's all.
Then there came Glyphs, which allowed us to decide when we wanted KS to return us to where we were or not. That was nice.
But now... look at Killing Spree:
1. We return to our original position wether we want to or not. LOCKED.
2. We hit the back AND THE FRONT of the boss, meaning we can be killed by the boss cleave or attacks.
3. We're no longer immune to interrupts, so KS can be wasted by the unpredictable Fear or knockback or whatever.
4. I think we also were able to use abilities or spells during KS. I remember being annoyed when they changed it so KS eseentially stuns you for 3secs.
It just feels like Killing Spree has gotten worse and worse over time, to the point that the old "Killing Spree killed me" joke is no longer a joke because it literally puts you in front of the boss now, can't be used if the boss is being moved, and can't be used when the boss does... almost anything.
I just miss the days where I could time KS to be used just as the boss fears the whole raid, and swapping out the KS Glyph because I know it would be better to be teleported back to my spot just for this one fight. And how Killing Spree meant I'd be hitting the BACK of the boss, not their front. I mean.. why would any of your spells do that?