Okay, more:

It'd be nice if I could use the mouse to move around in the file and to click-to-time without having to switch modes. Maybe let right-click or middle-click do the time function when in normal mode?

When editing, it'd be nice if I could add a line and have the marker still keep up with the lyric as tagged. That is, if I add a new line now, the marker gets one line behind.

If you're in edit mode and load a new track, the old lyrics remain. This is disconcerting.