To answer your question if it's possible to add new formatting rules. Sure, we are always adding new formatting rules. If there is a broad interest in a rule, we are always open to suggestions.
1.) We would have to discuss this one internally
For now we have more general feature request to turn off formatter on specific parts of code (https://github.com/DEVSENSE/phptools-docs/issues/319)
2.) We're unable to replicate. Would you happen to have a complete test case that we can try?
3.) I'm not sure if I understand this one correctly, could you please elaborate more?
4.) This is a bug (reported here https://community.devsense.com/d/932-formatting-issue), which we've fixed for the upcoming pre-release