"Wow can be played on WINE. I haven't tried it since WINE 2.0, but with WINE 1.9.x and Legion, it worked without a performance penalty when using OpenGL. Unfortunately, Blizzard's implementation of OpenGL is buggy, and since it's not a supported API, they're not improving it (by their own admission)."
Last I checked, Battle.Net also BANS you for using WoW on WINE. So it's really a non-option. And let's not get started on their new ubergame, Overwatch. All WINE reports on it has been Garbage, so it doesn't look like Blizzard even cares. And like I said, Valve has little to show for all its efforts, and they're a company that KNOWS about Microsoft's plans. What do you do when no one seems to care the sky really is falling?