As Jojo
noted, the upper panel of the pattern editor is quite big and takes a lot of workspace.
I think a
fullscreen mode for the pattern editor (no window border/title, no tabs) would be great to work with as many rows as possible.
Several apps like firefox, Gimp, etc. have such a fullscreen mode, with a shortcut (F11).
The fullscreen pattern editor would contain a condensed version of the panel in the upper left, without "keyboard split" :

(the pattern order would be displayed on the right, with also a little button to switch back to normal display)
Now look at a 1024*768 version of a fullscreen pattern editor :
* 18 values in pattern order
* 56 rows.

It also fits in 800*600 :
* 8 values in pattern order
* 40 rows.

With bigger resolutions, one could almost see the entire pattern vertically.
Well this is more of a suggestion than a request. Perhaps the first step would be to reorganize the upper panel of the pattern editor where a lot of useful space is wasted.