There already exists a no HUD option in the settings. Almost every aspect of the 'gamey' parts (including objective outlines, equipment, weapons, crosshairs, etc) can be turned off for each individual, if that's the way you'd like to play. If you're asking for a hardcore playlist, I have very little doubt those modes will arise after the full release.
The Beta contains only the basics of the game to stress test the engine, get feedback on the gameplay loops, and find the bugs/glitches. Hardcore will come; I agree, I love HC. Lower player health, no HUD, friendly fire; these are all fun mechanics in a lobby with serious players.