HTML Element updates; Bug fixes.
Add support for full-fledged 3D, third-party developers create plugins, which means you can do it! We need to finish it, since we have already started.
It's not their goal to make full-fledged 3D as of now. I'd love to see it happen if Scirra were to have more employees though!
Adding the ability to import simple 3D models would be enough.
kindeyegames.itch.io/c3-3dobject-alpha
Useful plugin