I get that you might be doing this (based on posts revealing datamining).
What is the point of not releasing this at D2 day one though??? We already lived through this once.
So many good times (raids, events, pvp maps). Why not reimplement these in D2. I get it's a new engine and might require some effort to migrate assets. The last 3 years have brought so many good things though. Why would you abandon all this?
The new stuff is great too, but don't let it stand on its own. Let's do this.