I happened to go searching myself after seeing this comment and seem to have found the source.
It seems to be a fairly well written article, but not a site I regularly read so unsure about credibility.
http://www.pcper.com/reviews/General...icrosoft-Store
From my understanding the modding being unavailable etc is infact MS Store only due to the game being encrypted. However, depending on how you build your game under DX12, the lack of hooks for FRAPS etc appears to be a very really thing under WDDM 2.0, as I get the impression each game effectively runs in it's own sandbox, can be read but not written to. This should in theory be easy enough to for the likes of FRAPS etc to adjust to, its just a question of say, are framerate readings as accurate if theyre trying to read a different "layer" sandbox, as opposed to pulling the statistics directly from the game. MS are apparently heavily pushing towards the use of WDDM 2.0 if the article is to be believed, doesn't mean you can't not use it though. But theres positives and negatives to using it, as with anything.