I know the developers try to keep things as simple as possible, would it be possible to add a "geek mode" to the admin page to be able to adjust more of the server settings? 
Geeks can use the command line, and all things are adjustable vi a the command line (with varying degrees of difficulty).
The developers will never be able to know which settings geeks might wish to adjust via a "geek mode" admin page, so they are unlikely to embark on this "quest for the holy grail".
Any geeks who wish to develop additional features in the server manager are welcome to submit code patches, via the Bug Tracker.