This is most likely a way to go to the next election with the filter still on the table for the types who want it (and somehow think it'll work) while placating the much larger - less politically influencial - group who want this filter canned.

Which means either they'll 1) wise up and dump it once re-elected (I suspect this is the case - there's more than enough evidence in Conroy's intray) or 2) bring it back soon after the election.