As stated by another comment, now they have to create the standard paper trail for each tracking instance, which makes accountability and transparency a semi-valid possibility
Probable cause is a low bar, but it's quantifiably higher than no bar. What constitutes sufficient PC for a warrant is a related, but distinct issue from whether PC (however interpreted) is required at all.
AND a judge has to put their name on it. Granted, IDs of judges are kept secret for certain courts, BUT nothing stays secret forever, e.g. Stasi records in the former DDR.