Ronaldinho in Milan, usefull or useless?

On 17 July 2008, Ronaldinho signed a three-year contract with Italian giants AC Milan after a €21m (£16.7m) million deal with Barcelona. That's a big gambling, as we know, AC Milan already have Alexander Pato, and Ricardo Kaka. The question is, where they're going to put Ronaldinho?

- The Christmas tree formation (4-3-2-1).
who will be the target man? Pato? As far as I know, Alexander Pato is not kind of target man striker type, he use to play like Kaka, bringing ball to front, dribble it pass view player. He is not like Filipo Inzaghi, the natural born striker who always seeking for the right place to score a goal.

- Changing Alexander Pato playing type
I don't think it would be effective. He will need more time to get use with the new style. By the way, Pato is not tall and big enough to fight againts Italian's defender.

- 4-3-1-2 Formation
In these formation I consider Ronaldinho and Pato is the main striker with Kaka behind them. I don't think it would be match with Ronaldinho and Pato. They will move around the field. The counter attack strategy will not be effective.

I can't wait how Mr. Ancelotti will use Ronaldinho in Milan in the new season.

Barca = Arsenal ?

Do You understand why I title it Barca = Arsenal ? That's because there is some ex Arsenal's player in Barcelona now. Starting with Thiery Henry, and the new one is Hleb. From several news I've heard, they still wants Gallas and Adebayor for joining with Barcelona squad.
I think one of the reassons is because Barcelona think they're failed to optimized Henry. As we know, in Arsenal, Henry was one of the best striker in the world, he always score more than 20 goals every season. But in Barcelona, as we know, he is not playing as he used to. And finally they realize that Henry is having trouble with the strategy that Frank Rijkaard use. And so, they dump away Rijkaard and take Josep Guardiola as the new head coach. That is a very brave decision from Barcelona, dump away Rijkaard and replace it with Guardiola, he didn't even have a reputation (as a head coach) yet. I'm sorry, I don't mean to underestimate Josep Guardiola. I know he is one of Barcelona's legendary player.
It's interesting to see, what would Barcelona like in the next season? Are they trying to optimized Henry by buying some Arsenal's player? Or they try to adapted the Arsenal's tactic?
Why they didn't replace Rijkaard with Arsene Wenger anyway?