Less Hair, a political issue.
I hope not, there is no need for European politics if a further EASA technical appraisal finds the compromise fix sufficient. The compromise may not have been on the table during the first discussions - previous thoughts influenced by the immediate aftermath of the accidents.
Q, does the compromise meet the agreed requirements (grandfather rights and special conditions for Max in general).
Q, will an EASA view be similarly acceptable to other regulators.
Political problems are within the USA: Boeing are hoping that congress has not said something previously which cannot be overturned - without political embarrassment.
Thus Boeing have to find both a tech solution acceptable to the world, and present it in a manner which Congress might use to their advantage so that a change of position is not embarrassing - political success.