Pendir,
I totally agree discipline is necessary ingredient for a succesful football team. Every good team has it: Juve had it, Milan had it, and even Real had it. The problem is what is discipline and pragmatism?
The common fallacy, IMO, is that most people see discipline as just obeying Coach's order hence they like to equate discipline to harsh coach.
While discipline requires willingness to obey coach's orders, I do not think Coach necessarily have to be strict "old school" in the process. It is all about power, and power can be derived from respect, penalties, rewards and ability to interpretate the situation. I think in this regard, Mancini will be a terrific coach for them: He was a world class forward so players will listen, and I believe he is a coach who tries to utilize players rather than requiring players to fit into his system: the latter method that Zach persued will inevitably create tension in a team full of stars like Inter.
Thus, I think players like Stankovic, Van der Meyde, Adriano, Martins, Zanetti, should thrive under Mancini's system.
As for the opposite case, I think Maurinho for Chelsea has all the ingredients to be a disaster. Yes Maurinho has been amazingly successful, and he is very neat person. On the other hand, Chelsea will have players with immense reputation and pride who will not just simply because coach said so. In a big team, ability to communicate and interact players is the most fundamental quality that is needed in a coach, I think Mancio has it and Maurinho don't. Expect big things from Inter, but I think they will fall just short of Milan: Ironically, because they arent as talented as Rossineri IMO.