Yes, you can add Battlefield 4 to Steam.
Yes, you can add Battlefield 4 to Steam.
It can be included as a standalone game, though it doesn't add much value.
Great suggestion for the Steam overlay, but I'm hesitant about adding another layer to my gaming PC while running a tough game. Let's break it down: Purchase the game from the store (digital downloads aren't always practical for most users; not everyone has a reliable connection). Install the game on Battlefield 4. Launch the Steam overlay and SteamOverlay.exe will also be active. What changed from previous versions? Game installation is now handled through the server, matchmaking, and friend lists are managed within the game. (Even in-game logins, like EA's old system or Warframe's current setup)