There's an easy fix for most of the issues with NEMA 1-15 - simply complete phasing it out. You already cant install new NEMA 1-15 outlets, so ban the NEMA 1-15 two pin plug on new equipment or as a retail item, and introduce a requirement for all new NEMA 5-15 outlets, extension cords etc. to have shutters for the line and neutral, opened by the ground pin (an improvement to the existing tamper resistant requirements in many states) and a label prohibiting 2 pin plugs, and tighten up the requirements for retention force.
Of course that doesn't help with the unshrouded pins issue, but with only 0.06" blade thickness to work with, its difficult to shroud the pins without increasing the risk of them breaking off in the socket.
With the average life of modern electrical goods being as low as it is, and the gradual reduction is sockets that would accept them, that could remove half the NEMA 1-15 plugs from consumers within five years, rising to 9/10 within ten years
Some concessions may be needed for repair parts sold only to a licensed electrician, with a sizeable fine if they are resold other than as parts used during a repair, and rewards for reporting contraventions funded by the fines.
You sound like a person who has never lived a year in the US.
Our plugs aren't falling out like crazy, and they hold in fine enough. If you're not a dumbass, you can live your life without a single electrical issue. There are also plugs that are WAY too tight. I have a UPS that is by design, incredibly tight on the plugs. You have to REALLY pull to get it out.
NEMA 1-15 and 5-15 on plugs are interchangeable. We don't need a ban on 1-15 plugs, that would probably just piss people off. We also REQUIRE shutters on our sockets on new installations that are opened by the top two sockets, although I have never seen this.
The US standard is gonna stay. We've had it for almost 100 years now, and it doesn't cause enough harm to people in order to replace the standard.