Hi minage,
Ah, you want to be able to control the preferences using amulecmd. This would make indeed controlling amule remotely more comfortable.
Some things will cause some problems, as for instance changing the port or language requires currently a restart. But other things are very sensible suggestions and likely to be implemented.
Would you please be so kind as to create a feature request in the bug tracker? I'm a bit disorganized and tend to forget about requests in the forums. - Thank you!