My dude, its the same platform. Its the battle.net launcher. Now you can just buy it through steam and launch battle.net from steam without just adding it as a "non steam game".

The reviews are 100% valid. Hows it devalidate a users gameplay experience becuase the battle.net app launches from steam all of a sudden?

I launch my battle.net client from steam for all my battle.net games via "adding non-steam game".

How is that unethical in any manor?