What I'd like to see is a "Next to Window" option for Item/Action Help.

We currently have:
"Fixed" which places the Help window where it's located in the HUD Layout.
"Fixed (Reversed)" which places it on the opposite side of the screen, based on where it's located in the HUD Layout.
"Next to Cursor" which does exactly what you'd think.

The problem I have is that Next to Cursor frequently covers up a majority of the interface. I enjoy having the help close at hand but not at the expense of being unable to see what the rest of my inventory or action bar is.

I would have Next to Window option make the help pane appear at the same height as the selected item/ability, but off to the right or left (whichever is closer). The help window can overlap other windows, just not the one it is displaying information for.