We need an official explanation for blizzards i guess^^
Well and we need better compatibility when it comes to custom atmosphere settings
There should be an official documentation/manual/wiki for the worldbuilder, covering all options.
I think relic relies on the community to solve that problem. If you remember Noun's post on the release of the WB when he ment we should take a look at the offical maps to see how they did things. By now i think looking at the official maps may have created more questions than answering them. Just take Stahlhagel's latest post on object splines with objects written in capital letters (Capital letter walls have wall cappings).