to be honest most of those neat things exist in many other languages - for example all the slavic languages + the more conservative germanic ones have a way root+prefixes/suffixes that plays a similar role. also most of the slavic languages have separate endings for feminine/neuter plural and slovene even has the dual.

Apparently, to a person who only knows english, which is a very inconsistent and mixed language, these features could look extremely neat, but the reality is that they are quite common.