[dmhouse]

"Also: The Emacs mouse support is not great. It probably hasn't been a high priority."

In what way? It's certainly as good as it is in any other editor, with the addition of several very Emacs-esque mouse-driven commands. For example, right click marks the region from point to the click point and saves it in the kill rin (like M-w); double right click kills that region. Using M- does the same, but modifies the secondary selection. Using C- with the mouse pops up several useful context menus. Try playing around with C-h k <mouse button> in various contexts.