Have you looked at Nextcloud with Collabora? Nextcloud is a Gdrive substitute that comes with encryption (on-server though). You can connect different Nextcloud instances to eachother. Collabora is 'gdocs for LibreOffice', and plays nice with Nextcloud as an integrated module.
You can self-host, or choose to at least decouple hosting service from the software service.
I've been using Nextcloud for various things. Running it for my company on a VPS, and at home for a few things on a Raspberry Pi.
I definitely think that a network like Edgeryders would do well to leave the silos like G alone and switch to tools that mimic the way Edgeryders works and organises better.
In terms of control, freedom to tinker, and the tools being fully within the scope of those using them, Nextcloud/Collabora fits. It's easy enough to use. It may be that for some further flung parts of the network it may be less accessible, at least in those places where the silos are the full internet experience. (I eg. worked in Central Asia with people for whom Facebook was their internet, the only way they could connect at all)