I would love rulers and/or snap-to guides like in publishing software.
One hack you can use in the meantime is to draw an image frame between items you want to line up; this allows you to use the bright pink edge to nudge your items, and then you can simply delete the frame as soon as you’re done. It requires a few extra steps, but the precision of the results is worth it.
This is the method I use when I want to make that verse numbers line up between staves. (Currently they don’t and certain hymns can look positively sloppy until you correct it.)