On Leap, "autoyast2" is requested by file /usr/share/YaST2/modules/Profile.rb inside package autoyast2-installation. It has the comment "without autoyast2, <files ...> does not work", which is exactly what I observe if I force the installation to continue. Comparing with openSUSE 13.2, neither "autoyast2" nor "autoyast2-installation" are on the DVD, and there is no problem to install with autoYaST. The system looks relatively different. No more findings at this point.