WSE must have taken a lot of hours to make it, a lot of working hours of professional coders. It allows to do a lot of things. But most part of the beginners in moding want to see some features they see in the cRPG in their mod, and some people would be glad to write their own extensions for WSE.
So, the questions are:
1) Is WSE free for public usage?
2) If no, why? Will it probably ever be released for public usage, probably, without the source code?
Didn't find any answers in FAQ area or any other.