+1 to having page up and page down keys.
Thinkpads have something like 2/3 or 3/4 height keys in that cluster instead of 1/2 height, so the keyboard is not quite rectangular. I wish Framework had copied that idea for their keyboard. And copied how Thinkpads have a narrower horizontal pitch on the function key row so they can fit in home, end, and insert keys.
I went so far as gimping a mockup in this post.