If you have a wireless card (or don’t need wireless) capable of working with Linux Libre, then by all means use it. There is no technological advantage to using Linux-Libre. There are principle advantages. I say this as someone who uses Linux-Libre on my Gentoo laptop (and maintains an overlay with an ebuild for Linux-Libre).
Tried one of the universal blue images on a Chromebook. It was nice. But it didn’t contain the scripts/configs to make the audio work. So that was that!
I like the concept, though.