Can anyone, with more brains and free time than me, check if any of the A league teams went through a change of more than *)50% playing squad (starting eleven plus backups / reserve bench) from one season to another? Unless I am mistaken, the biggest one-off cleanout was at the Jets. I
do not include Gold Coast or the Fury as they did not continue.
Even where a change of coach took place (and that surely is a biggie), teams like Bne Roar and Mlb Victory largely kept their squads.
The point I am making is that a decent coach can improve team's performance with better players, but no-one has ever chucked all their squad out, bought new and then won the league. Most teams had one or at best a couple of significant changes that made a whole world of difference - consider how Melb City stopped leaking goals once they brought in Alex Wilkinson to central defence.
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*) make it 33%, a third