The central reps form a balance point for council majorities . The policy procedure finds the 1 bill a majority supports over any other. Policy decisions by ensemble councils using Condorcet's rule also may follow a less adversarial path than winner take all. The added cost is certainly worthwhile if the vote leads to important budgets or policies. Same with voters and voting rules.
Accurate representation selects central and diverse reps.
Accurate legislation enacts the 1 policy that beats all others. Accurate democracy gives power in proportion to popularity. Many people are excited to learn that democracy does not have to mean winner take all. Instead it can lead to everyone having their fair share of representation and power. It is easy and it works.