To the point you made about the recent release notes: I'd much rather the developers of the game design software stick to adding functionality to help in creating games and let the people who write exporters and wrappers focus on exporting and wrapping html5 games more efficiently.
Scirra's a small team, and they only have so many manhours to devote to various bug fixes, expansion of current capabilities and development of new capabilities for their IDE. Not all C2 developers develop for mobile platforms, however almost all C2 developers use the IDE for developing games. Yes, everyone would like to have their specific development need addressed right now. There is a list of things I'd love to see C2 able to do, but I know that 85% of them only would be beneficial to a handful of developers.
In the end, your frustration is valid, but the way development in general and game development in specific works is that you use the tools that make your life easier until they've done all they can for you, then you get to work finding a solution for the challenges you face until you either get past those challenges, someone else comes up with a solution for you, or you give up.
I hate to sound heartless, but that's the life of a developer.