Text mode is awesome, but I'll suggest one more tweak:
When clicking outside the view rectangle and holding the mouse button down, the view rectangle moves to the location of the click, but it doesn't continue to follow the mouse while the button is held down. As a result, if I want to jump to a location, and then make fine adjustments, I have to Click-Release-ClickAndHold-Adjust. If this could be changed to simply ClickAndHold-Adjust, that would be perfect.
I realize this is an issue with the way the MiniMap scrolls on large files, but perhaps this could be solved by changing the way the MiniMap scrolls in this mode - Have it not scroll until you move the view rectangle near the edge, similar to how scrolling works when selecting text in the document.