Aahaha! I'm sure silent running would still have it's place, and the bonus should only be small.
I would just like to see sneakers walking more thats all. Besides, running isn't exactly the most stealthy way to move.
Also, it gives non sneakers the chance to run up behind a sneak walker, letting them spot the sneaker before they get spotted themselves. I think that would give nice little angle on the whole stealth/PvP stuff.
BTW the CB ghost perk sounds really good.