The next version of an international council needs actual authoritative power. There’s no point if someone just decides they don’t want to listen and will do whatever they want. Veto power should be curtailed if a supermajority of countries are in agreement otherwise a bad actor will push their weight around.
The UN is meant to be a forum for discussion, not a means for enforcement of any rules or laws. The whole point was for representatives of “all” countries to be able to come together and discuss their issues with each other.