Granting lay people the same right to vote as bishops undermines the hierarchical structure of the Church and resembles more the norms of synods of the Anglican and other Protestant communities, where clergy and laity are given equal voting rights.

Source: https://insidethevatican.com/news/newsflash/letter-101-2023-fri-june-16-schneider-on-synod/

It took another half century of theological wrangling, rival synods, imprisonments, excommunications, and finally another council in 381 (Constantinople I) to define the nature of the Trinity and the final form of the creed.

Source: https://www.lewrockwell.com/2023/04/no_author/vatican-ii-failed-not-the-church/