Was Agent Harris' transfer to counter terrorism a demotion?

For five seasons he is a lead investigator in trying to bring down Tony Soprano. In season six, he is now part of the FBI's counter-terrorism force, and we don't see him do much besides keep tabs on Middle Easterners in New Jersey.

This transfer coincided with the death of Adriana. And after the episode where she dies we don't even see Frank Cubitoso, the chief of the FBI's investigation on Tony, anymore. I suspect that after Adriana's death, the higher ups in the FBI decided that the Newark Branch had made one too many blunders in investigating the mob, and reassigned Cubitso, Harris, and other agents to insignificant positions where they couldn't do much damage.