I have no idea what "play out naturally" means. I think the Fed is doing an extremely good job; inflation is still low but US growth is better than our trading partners. And the Fed had to do that despite a US president who is a complete idiot and has done everything he can to scare the bejesus out of the rich.
One of the problems with a lot of analysis, I think, is that they compare this downturn with stuff that isn't at all like it. This was a serious banking collapse similar to the Great Depression, caused by rich people running to cash. Rich people are still running scared. Eventually they'll turn around and we'll have massive inflation. And people will blame the Fed without understanding that the alternatives were much worse. But I think that the massive inflation is a long time from now, maybe 10+ years. It might not happen until the rest of the world absorbs enough US dollars to fill their foreign currency reserves which should happen maybe 20 years from now. Ought to be fairly entertaining to watch but very slow motion.