Since we are talking about Parramatta lets actually use some meaningful and relevant data. I don't think it supports what you are suggesting at all.
The Chop and Change Era
2007 - 5th, 13 wins, 11 losses (Hagan)
2008 - 11th, 11 wins, 13 losses (Hagan)
2009 - 2nd, 12 wins, 11 losses, 1 draw (DA)
2010 - 12th, 10 wins, 14 losses (DA)
2011 - 14th, 6 wins, 17 losses, 1 draw (Bigface)
2012 - 16th, 6 wins, 18 losses (Bigface and Arthur)
2013 - 16th, 5 wins, 19 losses (Stuart)
63 wins, 103 losses, 2 draws - 37.5% win record.
The Pick and Stick Era (BA)
2014 - 10th, 12 wins, 12 losses
2015 - 12th, 9 wins, 15 losses
2016 - 14th, 13 wins, 11 losses*
2017 - 4th, 16 wins, 8 losses
2018 - 16th, 6 wins, 18 losses
2019 - 5th, 14 wins, 10 losses
2020 - 3rd, 12 wins, 4 losses
76 wins, 78 losses - 49.4% win record.
Key take homes
- Greater win percentage under pick and stick.
- Best three seasons (based on win percentages) under pick and stick.
- Four of the five best seasons (based on win percentages) under pick and stick.
- The only season from chop and change that is in the top 5 win percentages is actually the first one before any chopping and changing had occurred.
- Best two seasons are 2019 and 2020 (at the end of pick and stick).
* Ladder position impacted by salary cap