I agree. However for folks wondering why we don't "just" port the whole game - realtalk:
While I personally believe it's an evergreen masterpiece of whimsy and wonder, it would be a year old by the time Forge released, and given the architecture, cloud, matchmaking, etc etc etc etc differences between platforms, it would be neither trivial to port, nor uncompromised in that process, given it was designed with targeted Xbox One perf in mind to begin with.
Both audiences deserve better than that, as you'll see with Halo Wars 2 onwards, which was designed with Xbox AND PC in mind from scratch and makes the most of each platform's relative strengths.
At least port MCC. Despite it's mountain of issues, PC deserves a collection of sorts as a starter.