Whoever was saying there is plenty of time before the Olympic Qualifiers is crazy. 1 month to rearrange things appears easy, but a decision prior to the qualifiers by FIVB at this point will throw things into some chaos with Asian and European qualifying tournaments.
I am not saying whether S. Korea gets in or some other European team gets in at this point. There are rules that IOC & FIVB agreed to before all the World Qualifiers started.
Just remember Russia (in all sports) could have been thrown out at Rio, but the IOC made the call to say “no”. Still things continued after the fact. In Pyongchang, they competed under the OAR name. For the IOC to completely remove Russia (in all sports)from the games would be massive for the IOC and even Putin’s credibility possibly.