It is an interesting comparison. McNabb had more experience than Hurts, but was still known as a running QB like Hurts is now. McNabb took a big step in 2004 in the passing game and that turned the offense into a more potent unit. Many are hopeful Hurts can take a similar step this season.
What the 2004 team had that this team does not is a high level defense, led by experienced & great talent like Dawk, Kearse, Simon & Lito. It was not as good as the 2001 or 2002 defenses, but still quite good.
Owens is a HOFer on merit, but, like you said, one of the most selfish and vindictive personalities to walk into a locker room. We'll see how Brown does here. He is not Owens level talent, but hopefully is more of a team player and leader for the young WR and Hurts.
The good news is 2004 turned out to be the end of the run until 2008 whereas this season feels like the beginning of a new run after paying the piper for 2017. If Hurts develops, we could be in for some fun seasons. If they have to draft another QB next off-season, that will delay the process, but at least that player will walk into a decent roster and locker room.