Hey there!
Is a distribution of Collabora Office for Desktop via homebrew something that is considered or could be considered?
I much prefer installing my apps without inherent DRM, arbitrary verification processes that slow down distribution and even more importantly: the notion that Apple decides what I can and cannot install. So the less I credit their Store and use alternative, but vetted ways to obtain my software the better. (imho)
Welcome to the Collabora Online forum 
At the moment, Collabora Office isn’t available via Homebrew, and we don’t currently provide an official Homebrew formula for macOS.
That said, we’d really appreciate your interest in this! You’re very welcome to open a request on GitHub so we can track it and discuss it further with the community:
https://github.com/CollaboraOnline/online/issues/new/choose
Based on the feedback and interest, it’s something we can definitely explore together.
Thanks,
Darshan
Done!