Gee - I wonder how they assessed that they had a right to protest their demotion? Finishing 6th in the Club Champs perhaps?
I think that's the sore point for a lot of people - if it's supposed to be based solely on on-field performance, then it completely stands to reason that Mosman and Petersham, as the 2 lowest sides, should have been relegated (to fill out Div Two to 8 teams).
But, this is what the Ops Manual says:
At the end of the current season:
C.1 The club finishing last in the Division One club championship will automatically be assessed for regrading to Division Two. The winner of the Division Two Club Championship will be assessed for regrading to Division One.
C.6 The Board reserves the right to assess any clubs in any division for regrading into a higher or lower division.
I think Petersham, by their own account, would say 2023 was an annus horribilis - without extenuating or mitigating circumstances, their heads were going to be on the block regardless of the teams above them.
Mosman's saving grace was probably having the Judd minor premiership and (losing) teams in the 4ths and 5ths Grand Final. Same for Forest who took out the Barbour - Mosman had a 4th placed finish in Whiddon but other than that, neither club had any other finals teams.
St. Patrick's, you could argue, got short-changed as Colts Minor Premiers but they also had a 5th-place best finish in any senior grade (2nd XV), Kentwell and Whiddon spoons and 2nd-last place in Judd. Forest were Burke spooners but you could argue that St. Pat's had the benefit of higher club championship multipliers for Colts that placed them a lot higher than either Mosman or Forest, who were not good but did have better placings on average.
The next team you'd have had to look at from that list would've be Blue Mountains who won their maiden Kentwell - they were safe regardless (especially with Subbies having very few clubs west of even Briars). St. Pat's drew the short straw and Subbies will feel vindicated, right or wrong, seeing their 1s miss the Finals - their 2nd place in CC probably sends the message that they're in the right division
for now.
I don't think anyone would argue that Newport trading with Forest for next year (as per the "Clubs" pages on the website) is a bad call - top of D2 goes up and bottom of D1 goes down - but there will always be winners and losers with pro-reg. Had St. Pats and Petersham gone 1-2 in the D2 CC this season and Lindfield finished dead last way behind, it would have been unequivocally wrong, but that is not what happened.