coaching doesn't matter, but I really think it has more to do with what players you have. Who has the highest payroll in MLB as far as players? There you will find the most success. There are exceptions, but most of the time the Championships are bought.
Look at Atlanta's payroll difference now compared to when they were competing for NL championships. Since Ted gave up the team, they(Disney-I think) are not going to put the payroll out there for the players like the Yankees or Red Sox will. That is the problem. To blame Bobby for that is stupid.
2010 Payrolls
Look at the Cubs compared to the Braves, $146 million to $84 million. I'm not going to even compare them with the Yankees. Middle of the pack here at 15th highest.
1999 Payrolls
Here the Braves are 3rd highest. Only 12 million less than the Yankees.
If you want to call me a fool for thinking that this has more to do with winning than the head coach/CEO, knock yourself out.