I have tested the fighter chow + troll regen IN COMBAT on my druids and it does indeed work. It's about 14k HPS, but my druids are only 830ish. But then again they are bears, so large health pool.

It may get changed, but IMO it's not a bug since it's just a troll passive combining w/ it, and not exactly game breaking (it's slightly less than the Ysera's heal, which isn't a big deal either). It was also posted to the forums forever ago. IMO it's staying, but we'll see I guess.