I think we should increase the default amount of #padding for
MetronomeMark.
I personally use 2.5 for all my scores; that may be a bit much for some
people,
so I propose making it 1.5. We've recently had a bunch of people on
lilypond-user
asking how to make it higher. Obviously it's good to have them learn
about
\override and the like, but I think that 0.8 is too small for any
engraving project.