>>2059981 (OP)1. Flavor and immersion
2. Ruling party popularity and organization affects national unity and dissent
3. Party sizes affects which ministers are available
4. Which party you are affects some espionage missions (support own party, coups)
5. Obviously in general affects available laws
Yeah it could be simplified as democratic/communist/fascist/non-aligned but the extra layer of granularity does impact some gameplay elements and more importantly is kinda fun and interesting
After all isn’t having eg both the Democrats and Republicans represented with some flavor/nuance between them better than just Support for Broadly Democratic Parties: 98%