You can exclude the first ~$100k of your income when working abroad. https://www.irs.gov/individuals/international-taxpayers/fore...
More annoying than that is that it's extremely difficult to open a bank account overseas because of FATCA. It's less costly to deny Americans service than to comply with the US' reporting requirements.
> While there are some tax credits that lessen this burden
Not like it makes it much better. "We're going to completely fuck you over, but here's a small concession."
I suspect you're wrong that $100k covers the majority of expats, but even if you are, it's not like it's much better to fuck over a minority of expats.