We also do not have much user feedback in general - we do not know how many rusEFI units are used regularly and what are users looking for (we know about launch control).
Another weak point of rusEFI is documentation. If you've played with rusEFI for any time chances are you have help [improve the documentation.](HOWTO-contribute-to-documentation)
We probably would not articulate the guiding principles better than [https://github.com/betaflight/betaflight/blob/master/docs/development/Development.md](https://github.com/betaflight/betaflight/blob/master/docs/development/Development.md) and [https://github.com/betaflight/betaflight/blob/master/CONTRIBUTING.md](https://github.com/betaflight/betaflight/blob/master/CONTRIBUTING.md)