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Your situation seems normal. At idle there's no boost. Off the line there's no boost either so you essentially have NA power until the turbocharger spools up and comes into play. The 3.5 liter 603 engine was made to have more oomph off the line as an improvement to the 3.0.
The ALDA adds fueling ability to the injection pump as boost pressure increases. When working properly, the ALDA won't be a hindrance. It witholds the fuel until there is proper air available to burn it all. A lean ALDA setting will decrease max power output. A rich ALDA setting will cause smoke when accelerating and high EGTs. The sweet spot is barely visible smoke during acceleration. If you remove the ALDA completely, you must be careful with your foot and placing the engine at full load without enough boost to burn the fuel.
When you adjust the ALDA be careful not to damage the screw or turn it too far in either direction.
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