Some details:
eth and thorn are used in differential geometry as mathematical symbols.
There is an apparent shortage of dlike symbols in this field.
Arrangement of the font tables (and this argument goes really LaTeXy)
One could have essentially two points of view on the table arrangement:
a) Providing optimal kerning for a core of 256 glyphs. This would lead to
a mixture of upright and math italic glyphs in one table together with
basic braces.
b) Logical markup (more on the LaTeX path but sacrificing optimal kerning):
Make \mathrm{\pi} work (like \mathrm{\Pi} etc. already do work). This
means sorting out the glyphs according to their fontshapes in different
mathematical familes.
Note that the question after \mathbf{\pi} is an FAQ on comp.text.tex and
it is tedious to tell the users again and again to use boldsymbol on
that, whereas \mathbf{\Pi} works fine.
J"org Knappen
