@Gmt900
To make it short: You are looking for something which not exist.
What ever strategy you choose, the market earlier or later will test you to the extremes. So, you need to know with every option strategy you choose the emergency adjustment. If you think in an other way, you are on the wrong path.
To me the biggest problem again with any strategy which includes shorts in your market is the margin. As you say you traded short straddles and short strangles, this seems to be no problem for you, isn't it?
Coming to the BWC and BWB. Both are very good strategies. How do they become good? We who trade and implement them make them good. So the trader who is in charge of the strategy has to understand what he is doing. The same applies to future trading. There are no bad strategies. The strategies become bad when being traded the wrong way. I could now start to talk about the pros and cons from BWC and BWB. Would this make sense? No. Why? Let me show you some screenshots from my trading desk:
Broken Wing Butterfly only with calls
Broken Wing Iron Condor with put and calls
and here the next level:
Synthetic Broken Wing Iron Butterfly
Synthetic Broken Wing Iron Condor
As you see, what ever was done is perfectly managed over the zero line. Why? Because the way it is traded. You see four different ways of trading Broken Wing strategies and each one is as good as the other one. So no need for pros and cons. But what is needed? A trading plan and the knowledge how to make them looking like that. Here the question occurs: Do you just want to implement a strategy and then do as little as have to be done or are you a trader which likes to adjust and to play the game according to market moves? I guess in your way you prefer the way you not have to do much. So what could be your solution? Credit Spreads.
Before I move on, if needed, I will wait for your comment on the above.
Take care / DanPickUp