Zarafa COS 7 - Why install all webapp plugins?

I've recently just installed WebApp 2.2 RC onto a clients server on ClearOS they had issues going to the settings then I remembered it was due to the plugins needing to be updated. When I wanted to remove some of the entire catalogue of plugins that were installed via yum I couldn't due to it wanting to remove app-zarafa core and other clearos apps.

I eventually resolved this by doing rpm -e nameofplugin.rpm --nodeps to resolve the issue but my question is this:

1) Why are all plugins for zarafa-webapp installed by default onto clearos installs?
2) Why does removing ones you don't actually want to keep require you to remove app-zarafa as a dependency?

Even when not enabled it will still slow things down and also plug names change from time to time and also as recently happened with 2.2 they've changed the authentication so you had to re-install all the plugins you had to the latest versions. I can see this being a pain for other clients if I want to install COS 7 in the future so I'm wondering if someone could explain the reasoning behind question 1) or at the very least question 2).