One of the most popular requests regarding control options is a dedicated Morph/Un-Morph button. I found myself having trouble double tapping down when I tested analog sticks, and since I already added Prime-Style control options (Spiderball), it was a matter of time until the Morph button was implemented.
The button is configured at the options screen, and it coexists with the classic double tap morphing. There is now an option to disable the classic Morphball activation, so people who use analog controls won't un-morph by accident.
That single button introduced a pretty significant amount of bugs... well, it exposed some of the older code that worked around even older issues. After many test builds the engine is stable and more flexible than ever.
There are other control features being worked on, those will be announced as soon as they are stable, polished, and confirmed to be in the engine.
Regarding the progress report, some people asked me about the "Steam Community Compatibility" Item. The game won't be released on Steam, nor it's on GreenLight. If you manually add AM2R to your Steam game list, you can launch it from there, and the Steam Overlay will be visible from inside the game. Right now the display is incorrect, and I did a bit of research on some options to get it working. But it will take a lot of trial and error, and it's not a primary feature.
As always, if you want to suggest features or improvements, you can share your thoughts here or at the Forums.