Decidim: a governance-first platform

I've just started looking at Decidim, so this may be a case of everything looking like the nail to its hammer, but, given all the posts about the mechanics of governing this instance already, I wondered whether considering a separate platform specifically designed to address many of these governance-related problems (as I understand it -- again, early days) might be in order.

Decidim might actually be more akin to a sledgehammer in this case, but I figured the point still has merit, as a discussion. There must be other solutions out there too. How does Debian make decisions, for example?