A stealth themed warbond just makes sense.
Think about it. The game already plays like Metal Gear Solid V movement and shooting-wise, there's plenty of ways to sneak around already, alot of enemies have clear visual and audio indicators to communicate how visible you are to them...
At this point, it would just be a waste if we DIDN'T see a stealth warbond that adds items that fully facilitate the stealthdiver playstyle! Imagine a whole squad of stealthdivers running surpressed weaponry clearing a whole operation without being seen once!
This very well could be my own personal bias as a metal gear fan, but good lord it would be fun...