What kind of discussion topics do you think have missing comments by me or marciano? For discussing something like
https://github.com/bkaradzic/bgfx, I first need to dig into the source code to understand what it is at all, something I don't have the time for, regarding D3d I aggree with attila that native support is something better than just a wrapper. If abstraction layer is well enough, it shouldn't introduce to much bloating code, although error checking and verification work of course increases.
Regarding the scene graph I never expected to much from it, as most of the time you still have a scene graph somewhere in your application, so of course optimization within Horde3D might be easier when scene graph is removed, but to allow beginners still an easy beginning with the engine, I only would recommend to "extract" the scene graph part and move it to the utils library, so making it optional. Something I discussed with marciano years ago. But as the animation module AFAIK is currently depending much on the scene graph API, that's something not so easy to realize. But I'm open for any kind of specific proposals or patches.
Regarding model resources, marciano
drafted a proposal but due to time and work limitations nothing happened here, but everyone is free to work on that topic and make proposals or patches.
Same answers fits more or less for any of the topics mentioned by attila.
Don't get me wrong, I really want to support you and all the other guys with your work with Horde3D. But I'm not an expert neither for GameEngines nor for modern GPU programming. So all I can do is commenting your proposals as far as I understand them, or let you discuss it and pick the resulting patches, everyone agrees on and integrate them within Horde3D. That's what I proposed in the past and I'm still willing to do.
I don't know how stable the github branch of attila is, so I still hope someone may find the time to create patches for the SourceForge SVN trunk from it, that add features or improvements that don't affect the stability or compatibility. If that's the case I promise to commit them in less then a week. If features or improvements with a deep impact have been integrated I also don't have a problem to make a new official release for the community.
If you're missing something that does not results in having me to read pages of source code or books, don't hesitate to ask me for it. But I please the community to stop from doing only general complaints about to few comments, homepage design, access to horde3d.org, outdated wiki pages or no submitted code. That does not make things better. I read the forum regularly and if I think I have something to say or discussion will improve from my comments be sure that I will answer.
I'm also depending much on the community, because I neither have access to MacOS, IOS nor do I have a working NDK toolchain for Android. All I can test by myself is windows and linux.