IMO we should drop the 3D requests already. I can totally agree with the users who posted these kind of opinions: C2 is for 2D and if you want to do 3D development, you should move to a different engine (like Unity, Unreal, Godot, etc..). If you really want to stay with C2 and do 3D, then try the Q3D plugin. 3D is complicated, way more complicated than 2D, and also, it takes up way more time (just think about creating the models). I'm not saying that 3D game development is not a good thing to do, but it's not for C2.
I think C2 is one of the best 2D game engines, and using HTML5 is rather an advantage than a disadvantage. I can think several ideas that I'd love to see integrated into the engine, but I only stick with the one I think is the most important: Hire more people! If you want to be able to keep the pace of the game engine market, and also if you want to satisfy the community, you'll need more people. Scirra stated before, that it's not an easy thing to do, because C2 is a pretty complicated software. Ok, I can agree with that, but the market and the community demands the bigger updates and redesigns of various parts of the engine. I'm not saying Scirra should hire 10 programmes instantly, but 1 or 2. Don't think too long on this. It's a step I think you must make very soon.
Just to note: I tried the Airsape Steam demo, and it works just fine.
For the developers who say you can't make any serious game with C2: Yes, you can. The engine is fully capable for that, even with the use of wrappers. And don't forget, the overall game depends more on the developer, than on the engine.