From my POV as a US citizen that has been living as an expat in different countries for the last few years, US banks globalizing is a net positive. I get convenience and speed with US banks that I get nowhere else -- i.e. the most online traditional bank in the UK is probably NatWest, which sucks because you have to get a physical card reader (like an actual machine that scans your debit card) in order to use the online banking most of the time. There's Monzo which is fully online but it sucks internationally, and adding funds is a pain. In China I had to jump through so many hoops to get an account and there are hundreds of restrictions in place; likely because I'm not a Chinese citizen. This is not a pain point for any immigrants I know in the US as it's fairly easy to move money around.
I'm sure US banks in control is bad at a macroeconomic level, but for the average consumer and at a microeconomic level I think it could bring about a lot of positive changes. Then again my perspective is probably skewed as an American