Calm down, don't shout.
You're ignoring the opportunity cost of Bloodgauge every time you use Bloodspiller.
Every time you use Bloodspiller, you're losing out on 3.33 Bloodgauge. If we take the remainder of Bloodspiller's potency over the average GCD, it's 143.34. You divide this by 50 to obtain the potency per Bloodgauge, which is 2.8668. Now you multiply this by 3.33 and you get 9.546. Add this to your math.
It's a marginal loss. Less than before, but still a loss.
I don't see how since you can still easily proc Delirium in the first BW window, if you open with BW.