After the series of usb beta problems with 10.11.2 betas, I am afraid of Apple betas.
Dev betas really shouldn't be installed on your main Mac. And they shouldn't be seen as a shortcut to fix any issues you've been having.
"Pre-release software, including Developer Previews, seeds, and betas, should be installed only on devices and systems that you have registered under your Apple Developer Program membership for development and testing. "
https://developer.apple.com/support/pre-release-software/
There really is no need to be afraid if you follow the guidelines.