this is true, however there things to consider:
1) the .deb is 35k and the binary 24k, so the impact to the rootfs is minor at worst
2) the .deb can be unpacked and the kanjipad binary put wherever a person likes (gjiten must be told where it lives regardless)
3) i am not in the business of making packages... though i must say i may try to build an optified package today just out of curiosity. if anything comes of it ill be happy to share!

UPDATE:
i optified the package but the binary calls specifically for /usr/bin/kengine, so without modifying the source code (trivial) and recompiling the binary, this package can only be half-optified.

seeing as it is less than 35k overall, i dont see the point.