How realistic is it to use a self-hosted OWIN server running ASP.NET vNext on Mono? What can we expect in terms of performance? I was always under the impression it was pretty far away from being a viable option, Microsoft help or not.
I don't know if Valve does this on purpose, but their remake of titles (Team Fortress, Counterstrike, Dota) all keep essentially the same gameplay mechanics but introduce new enhancements (graphics, UI, matchmaking, etc.).
This is important for eSports. Having to learn a new game every 3-4 years so you can follow along is difficult for viewers. It also allows professional players who invest the training to transfer their skills more easily.
It's different with other companies -- Blizzard, for example, created a new game in StarCraft II. It shares a few similarities with Brood War, but the differences are vast. I really, really like Valve's approach.