I think the important thing to shoot for in a project like this is striking a balance between having an overwhelming number of options and having too few options to allow adequate customization. Most of us can probably agree that PitBull configuration window is out of control. There are just too many options; it becomes very "fiddly" to work on anything because you are clicking through various parts of the tree, changing tabs, trying to remember where that option you just changed two minutes ago is hiding... it's a mess. ag_UF, on the other hand, doesn't quite offer enough options.
It's definitely possible to offer a large number of options (thought perhaps not quite so many as PitBull) while still allowing the user to manage them without going crazy. You'll need to devote some time toward carefully considering how to arrange the options interface, how to group choices, etc.
Good luck, I'm curious to see how this project goes!
