Seven Years War Prussia

Simple question really: How much better can Prussia do in the Seven Years War in term of victories and territory after the war is over? Effects of this?
 
The only period the Prussian really can do better is in 56-57, I.e they can overrun more of Bohemia quicker, maybe capture Praha. Thing is, they should not really have done as well as they did in otl.

If they do better in Saxony/Bohemia in 56/57 that might force the austrians out, but then it will not be the 7 yrs war.
 
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