First of all -- 3.0 could not have come at a better time! I was elated to run into it right as I was starting up a project that used it. It's working great so far, and the improvements are spectacular! It being a free update is a very, very appreciated bonus.
I only have one request / question. I understand that this might be difficult, due to how prevalent region IDs are in snippletless generation, but I was wondering if there was a way / could be a way to use region IDs as decoration if it's not a region ID used by the plugin? For example, you can use Details to place grass tiles automatically in a cave, I was wondering if you could do the same kind of thing with Regions. It seems to only paste tile data and doesn't maintain any region IDs (or events).