There are no tax benefits to be had for US citizens trying to hide money abroad post-FATCA. None.
The US has the most draconian global tax system of any country in the world, and has the unique position of being able to actually enforce it due to the fact the USD is the reserve currency of the world and every country needs to stay on the good side of the US Treasury to transact in the global economy.
In fact, the laws are so strict, they make living abroad as an honest middle-class expat a total nightmare. I have friends who cannot find a single bank in their country that will work with them because of the reporting requirements of working with US citizens. They cannot save in foreign banks and they cannot invest either due to the US penalizing foreign Mutual fund/ETF purchases by private citizens.