On the brightside the dps boost makes the Elite Slavers still worth it, unlike advanced Slavers.
Without contraband looting the Advanced Slavers aren't any better then basic as moving from photon mines to quantum mines is a wash at best. Adding Photon Torpedoes on the other hand, which have the best dps, is a huge improvement and my Elite Slavers do wicked damage. They blow up T'Kanis borg cubes with easy.
From what I've personally seen posted in the bug forums and tested with advance & elite Orion Slavers, they're currently 100% broken. Out of 30 different test runs, nothing was ever stolen. It also appears that the powers to be are ignoring trouble tickets for this problem.