I always been a optimistic more than a pessimistic person, but at this point the "realistic" part of me is strongest. The realist in me gives a pessimistic outlook. Of course I am not dramatic like some and claim we will be relegated or anything, no I expect us to reach third place and not challenge for the scudetto at all if Galliani suddenly don't sign some real quality players. At least a fullback and a forward.
We have lost our best players, our biggest legend ever and our best young player. Apart from Silva we haven't really done anything to replace the void they left.
the positive thing is that we have a new manager and that he may shake up the squad and come with new ideas.
I can't believe anyone thinks that selling our best player, our most commited player and the most loved player by the fans. I can only come up with one positive.
1. We made money and his wages was high. (and also paid his brother...)
Here I answer your points.
(1) How is that even a point? Of course he can't be like a homegrown player that is a living legend. Is that really a reason for us to think this transfer was good? Just listen to him in Real Madrid, he still only talks about how he liked Milan and wanted to stay.
(2) He had some niggling injuries. He is on the other hand healthy now and was Brazils best player in the confederations club cup. He looked as fast as ever.
(3) Leonardo have hardly used this 4-3-3 formation this far. In fact he have used Ronaldinho in Kaka's favorite position behind two strikers the most. Kaka always played better there than as a second forward.
(4) I call this non-sense. Pirlo always run a lot. Flamini and Gattuso are the only two players running more than him and working more than him and that is not even his duty. Pirlo benefit from mobile players as his game was around distributing the ball to them. Seedorf also is not lazy, his stamina just don't keep up and he have these bad days.
(5) I suppose this is a joke. Of all Milan players none was more loved than Kaka by the fans and the curva. He was the player none jeered and we had the best fan song for. A song that was heard often and even made it into FIFA games. I yelled my lungs off singing it.
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Here is my reasons why this was a bad move.
1. He is a marketing icon that bring fans to the club and create attention for the team.
2. He was very loyal and commited.
3. He was a model professional. (and to think we "replaced" him with the unprofessional party boy

)
4. The fans loved him and always supported him.
5. We won't see the money we got for him reinvested in the club.
6. He was the player that brought guaranteed success in UCL.