I like that you’re trying to make discussions more accessible than they would be on GitHub. With a suitable tag, I believe these threads would be quite welcome in General talk.
Don’t hesitate to make full use of this forum. If we indeed get to the point where people are bothered by a large number of such threads, I expect we’ll be happy to find a solution involving categories for OSM-NG in particular and/or for software issues more generally, but I don’t think we need to preemptively worry about that.