Another thing is that Prussia would still have been vassal of the PLC; king John Casimir released Prussia from vassalage in exchange for Prussia switching sides and joining PLC against Sweden (treaty of Bromberg 1657). If Prussia still is Polish vassal, it might delay or even stop its rise.
Originally posted by
Blackfox5
Second, Poland is in a bad place geographically being atop of the Central European Plain with few natural defenses. It has ambitious and powerful neighbors - Sweden, Prussia, Austria, and Russia - with no natural allies that can help.
Austria (HRE at the time), in fact, helped PLC during the Deluge; there was no particular conflicts between HRE and PLC and a potential common enemy - the Ottomans, as later in 1683 IOTL.
As far as Prussia goes - see above.
If there are no wars with Russia and Sweden, PLC can concentrate on the Cossack question, ever present danger from Tatar raids and, of course, the Ottoman Empire. Such PLC would be significantly wealthier and stronger; therefore, there would probably be no treaty of Hadiach (negotiated when PLC was weakend by wars), and PLC would try to bring Ukraine back by force - possibly with some success, although it is possible that in face of much stronger PLC Cossacks would agree to some less generous terms without too much of bloodshed.
Stronger PLC with the Cossacks in her ranks would also be a much more difficult adversary to the Ottoman Empire.
However, internal weakness of PLC political system would remain the same. It wasn't changed IOTL after desolation of the Deluge; stronger ands more successful PLC would have no reason tp change the system that works.