Downloaded and installed off the Leap 15 beta Live CD (KDE) 03/01/2018. I
notice in the installer that it does not automatically partition my whole disk
even if I ask it to delete all existing data - instead it wants to use only 100
GiB or so. I have to go in and resize the volumes to my liking manually.

I would expect the installer to select and partition my whole hard drive if I'm
overwriting all existing data there, but instead it only proposes to use a
portion of it. I can work around this issue by manually resizing and enlarging
the suggested volumes.

Thanks for your attention.