FWIW, I switched my allocation from 60/40 US to 50/50 in late August due to this issue. So far so good, I think in the last few weeks int'l has fallen less than U.S., but I rarely make changes and keep them years -- so we'll see.
I have heard that one issue with developing country stocks is simply that for various reasons the returns on economic growth are less likely to be captured by shareholders. To the extent that's due to wage increases, that's good for the world. To the extent that's due to corruption, it's not.
Globally diversified portfolio + ignore the noise seems to be the best bet, on average.