[CentOS] Question centos 7 upgrade

Hello,

I make a test installation with the new iso 1503-01 but I mean with this 
release is anything broken ?

The first thing, is it "normal" with this release avahi-daemon is not 
installed!

I disable this always ;-)

The nfs-server installation don't work any more correct for me, I can't 
connect from a client?

some packages are broken like firewall-config?

Is it a better way to install the "normal" Centos 7 and afterward upgrade to 
Centos 7 1503.

Thanks for a answer,
-- 
mit freundlichen Grüßen / best Regards,

  Günther J. Niederwimmer