Most of Godot's development is managed through GitHub, so it is quite possible that material (issues, feature requests) reported here on the forums will be missed and/or overlooked.
I'm fine with them being posted here, but I just wanted to mention this to set expectations. Ideally bugs and feature requests posted on the forums should be cross posted to GitHub for better contributor visibility, if the desire is to have the material seen by contributors (and potentially influence Godot development).
As far as having specific areas for this type of material to be posted, I dunno. I suppose we could add a section called "Engine Development" or something like that. That said, the forums are not setup to be an issue tracker (nor do I want them to be), so I'm not totally sure what, if any, changes should be made.