Except for & Barring

"Except for when the Federal Reserve Bank or the Bank of Japan fails in increasing or decreasing the interest rates timely, it is a bed room where the synchronization lacks perfect success."

1) It's the sentence I made , and can I substitute 'except for when '  with 'barring when' ???

2) and, I want to know if  I write right sentence.

"Except for when the Federal Reserve Bank or the Bank of Japan fails in increasing or decreasing the interest rates timely(in a timely manner)"

----> what I want to mean in this part is "except for when they (FRB or BOJ) fail to choose right time to increase or decreas the interest rate".

3) and "it is a bed room where the synchronization lacks perfect success."  is right expression?

I mean to express 'it is a bed room where the synchronizaton failes to succeed fully(or perfectly)

but I have to avoid the word 'fail to' in it.

So what would be the best sentence for this?

bedroom is right.. it's my fault.

the original text is

"Nowhere is a failure to achieve perfect synchronization more lamented than in the bedroom — unless it's when the U.S. Federal Reserve or the Bank of Japan raises or lowers interest rates and gets the timing wrong."

it's from 'revolutionary wealth' by Toffler.

but I have to write this differently,  more simple if possible.

ok, 'there is nothing worse than ' will be nice. thank you.