I'm confused how you guys say Xenos win based off of the blood splash. You do realize... that... the xeno dies as well?
At the very worst, that would end with a draw, as ten thousand bugs would be acid sprayed by 10,000 dying xenomorphs.
Besides, the acid spray is overrated. Dude put a shotgun in the Xenos mouth and pulled the trigger and just enough sprayed out to cover his chest. It's not as if it soaked him. Considering the huge size of the Arachids, at the very most they would lose whatever leg claw they used to spear the Xenomorph.