Is that good or bad? Maybe a naive thought but the first I think is that check every time is to check biometrics matches with what is in the passport without storing them, checking only once mean your picture and fingerprint is stored a central place and is used in combination to later verify that the passport is yours
Before this change, my average time for EU immigration check was 10-20 min. After this change, it's 2-3 hours. Is that good or bad?
I don't care much about "verify that the passport is yours". For centuries, the person presenting the passport was supposed to be the owner of it, with their photo (aka "biometrics") as a proof. Comparing your passport picture with your face is what border controls have been doing since forever.