Yes that’s basically it. I don’t think we said “this BP will not be release in the pack” but rather we aren’t going to try to hype it up as a feature or anything. If somebody can do cool stuff with it, go for it 
One day it may be useful enough to get advertised as a thing.
Ideally one day this tool will create rivers and when it finds a ‘low spot’ it will pool to make a lake up to the threshold size before trying to trace a new river and/or waterfall from any ‘leak’ points. But it probably needs to do some of that in c++ for perf reasons.