Good question, and my dilemma is this: After buying WitE, WitW and all the DLC on release (and not really going deep into the games all these years), I hesitate to invest $71 in a "new" game that looks quite the same on the surface. Also, the editor is very important to me, and not sure if there are significant enhancements to that.
It appears the ideal buyer is someone who has pretty much played out the original and all the patches, understands the system very well, and is looking to step up to a "super" patch of sorts. Which makes perfect sense, but that's not me. Also, a must-buy for someone who has never played the series.
So despite my itchy trigger finger, I need to hold off on this one.