The forced Origin to EA App does NOT work.
I am having the exact same issue on different PCs and Laptops, all otherwise fully working and operational, with absolutely no other issues.
This has rendered access to paid-for Content impossible, because now unable to use Origin.
The EA staff on this Forum are not listening, and seem to be just playing for time.
EA needs to expedite a fix for this, or at least stop the forced EA Upgrade from appearing in the Origin screen, until this major bug is fixed.
It also sounds like people who have managed to upgrade, are having issues with the EA App, suggesting it is not ready for prime time, and needs to be withdrawn until it is.