For those who missed it - quote from Robin
Since Okri’s challenges was released we have ramped up the console team though to get the last stages of polish on mainly UI, xb1 features, tweaked difficulty and improved performance. Performance improvement that has and will reach PC as well for the most part.
The main cost to porting the game to xb1 has been making the new updated graphics performant enough to run on a console and to make the UI console/controller friendly. As well as the project management side that runs all this, does the submissions to microsoft etc. The one thing that it has not affected is how fast we produce maps as our maps are more or less platform independent. We’re releasing the same maps on xb1 as we have on PC.