I don't think he's a franchise player, but he's very valuable in that he gets a lot of points without having to have plays called for him. That's a great kind of player to have as your #2 or lower player.
He's just on the wrong team. Maybe if Philly reconstructs itself... but I don't see why they would want to rebuild around him instead of Iguodala. Sadly, I think the Brand experiment has already failed (and might have failed before he played a game). They should trade him for a running game player if they can.
He plays a completely different style than Andre Iguodala and Andre Miller, the two other best players on the team.