Established political duopolies hold their members on platforms that can devolve into what can be summarized as “anti-opposing party.” Time is spent condemning the opposition’s stances without defending, or sometimes even presenting, alternatives. While there may be philosophic stratification within the dual parties, these differences are subordinate to the party positions.
Splitting these duopolies into multiple mini-parties encourages more active discourse and requires proactive engagement among colleagues when presenting and defending positions.
Flexible, ad hoc coalition formation would be the result.
This would switch the structure from implicit alignment within a larger party to explicit alliance between smaller parties. Ideally, this would also result in a better representation of constituent demographics and preferences.