Mandatory testing specifically for university placement is the bigger problem. It forces people to take paths that are unsuitable for them, just because "the test said so". For that, I applaud the person filing the FoI and hope that none of the snark, redaction, or delays gets in the way.
The Abitur is simply a part of a flawed system where a few mandatory test scores divine out the rest of your life. On the other hand, the US system doesn't have these flaws - it allows more people to receive higher levels of education.