I ended up reading the whole of that thing from start to finish because it was bloody hilarious. Thanks for posting it.
As for the JME topic, I still think that logically something destroyed in the past won't exist in the future and so destroying it would have been a better thing to do. However, I suppose on the off-chance that Ultimecia were able to build another or something, it'd still be best to have the JME there to use against her.