I don't think we have to install tons of apps by default. The "installed by default" thing was an ugly workaround for "we don't have an application installer" now we have one so we should only install stuff that is really necessary.

I don't know if is easy to agree on what exactly is "really necessary"...

But, in fact, I was talking about preinstall Deja-Dup, and change Evolution by Geary.
The other apps, I mentioned mostly to refer to the other functions that Evolution offers.

Sorry if I made this confusing. Really bad English here.