Why doesn't the 'nis' package in Ubuntu 10.04 update system config files?

Setting up an NIS CLIENT in Ubuntu 10.04 Desktop (amd64)

Assumptions: networking is OK, and there are working NIS & NFS $HOME servers on your network.

"Install" = "sudo apt-get install"

expected results:
  Install 'nis' package.
  Pkg config scripts prompt for a nis domain name, and sets up all configuration files.
  Be able to login/su to nis user with NFS $HOME.

actual results:
  Install 'nis' package
  Pkg config scripts prompt for a nis domain name, and populates /etc/defaultdomain
  Manually modify /etc/{passwd,shadow,group,gshadow,nsswitch.conf}
  restart autofs
  Am able to login/su to nis user with NFS $HOME.

Missing bits:
  /etc/passwd & /etc/shadow need "+::::::" as the last line of the file.
  /etc/group & /etc/gshadow need "+:::" as the last line of the file.
  /etc/nsswitch.conf needs a line that says "automount: nis"
  (interestingly, nsswitch.conf has a line that say "netgroup: nis")

Why doesn't the 'nis' package in Ubuntu 10.04 update all the required system config files to make it useful?