I haven't seen what people have said in this post but this is how I feel about Tony Allen.
Tony Allen still has room to improve, just like House who has become a better player as a whole (not playing outside his box, maximizing what he can bring to the floor) because of his veteranship, I think Allen will reach that and be a good bench player for a long time in this league.
Defense: Tony Allen has been extremely underated on his defensive side of play. If people just look at his box score, they don't see how TA has been on the D. He has a great knack of where the ball is and either deflecting, stealing or making the offensive player worried about catching the ball. There are at least four or five plays each game where he is somehow part of a steal or close to one by deflecting the ball. He has been very good staying with the man and he does come up with some occasionaly blocks. Like I said, the box score does not show how well he has been defensively.
Offense: I truly think that Tony Allen is the key to the bench on offense. House can get his shots, Powe can get points off boards and depending on where he gets the ball down low, but TA is the only one that can CREATE shots. I truly believe that Tony Allen is the Rondo of the 2nd team, as in when he's playing aggressive, taking to the hoop and creating shots for himself, the whole 2nd bench plays with a better rhythm and starts clicking. For those who want to challenge me I invite to watch the games and notice how the bench plays when TA is just staying back and what happens when he takes to the hoop. When he's aggressive, we get to the foul line so we're scoring points off FT, or when he misses (which he does miss) then Powe has a chance to clear the bucket, and it opens up for House because they have to respect Tony's ability to take to the hoop. I have also noticed that Tony doesn't seem to get the respect from the refs as there are times where he does take to the hoop and they dont call fouls. The thing is that even when TA misses, it's still good because it does create for the other players (as opposed to a missed long shot).
Over all, Tony Allen still has a lot of room to improve, but he has shown great leadership with that second unit. He's not playing out of his box (although he occasionally he does get out) and I think he's one of the reason that our bench has been playing better as a unit.