Context menu is the key
EGroupware modules/apps are not uninstalled (even if there is still something like this in the setup). You regulate this via execution rights on groups (or users):
Create a default group for normal users (or take the already existing one) and give the basic execution rights. With further groups you can then assign special rights.
This way, users only get what they need and EGroupware becomes clearer.
What do you mean by that exactly?