Can RetroFE be controlled via command switches? If not is that something that could be added in the future? This and the previous would allow many third party features to be added to RetroFE.
The only switch I'm aware of is for creating a collection. I'm curious, what exactly would you want to have control over from CLI?
Other than launching directly into a collection/playlist or overriding the layout specified in the conf file I'm not really sure what you could have in mind. Even those 2 things would be pretty niche in terms of usage I think.