Before I log this as a bug, I just wanted to make sure that I've not missed some patch notes somewhere that said these have been removed? I've now cleared every CP in DC on heroic twice and not a single agent has spawned, whereas before I'd get an encounter roughly every 8 to 10 CP's.
There must be something wrong because they haven't showed up for me after over 50+ SHD levels i gained from yesterday to today. I managed to get the warning that rogues were in the area while roaming D.C. and after endless searching, i couldn't find them and then the music just went away. I was thinking to myself today that i wish there was a toggle that let them show up more often.