First i like FIVB calendar more than FIBA or FIFA. I like 4 year plan and separate national and club season. But sure, they need to make less games and give little bit more rest for players, not 2 much but just little bit more.
Its a big NO for wch every 2 years.
But i don't think that 32 teams in wch are bad idea. They just need to make system better, for example like champions league 15 years ago. 8 groups with 4 teams, that is 3 games (currently is 5 games in 4x6 system). After that they can make another 4 groups but without caring points from stage one. That is 3 more games and 8 best teams will make to 1/8.
So this is 10 games in total with 32 teams, now is 12 games in total with 24 teams.
Players will have at least one more week for rest.
Yes they will be more weak teams but that is ok, they will not make to stage 2. And at least every continent will have more teams representing.
For 32 teams, by far the best system IMO is the one FIFA world Cup used do far. 8 groups of 4 teams, top 2 qualify, then eightfinals, quarterfinals, semis and medal matches. Simple, easy to understand and leaves little room for meddling.