Apple seemingly want this update to just "be there". Probably the reason there was no beta.
Because it was an easy fix? Some of these 'zero days', and other security flaws are from oversights by programmers and insufficient testing. Fixing some are almost as easy as 'dotting the 'i''. Does there need to be a prolonged beta testing regimen for a simple fix? Especially when it pisses off a known PITA? I love it actually... 'Take this, ******s!!!'
Love it, love it, love it...