Is there any documentation out there on disabling this in the installer via a flag/switch? The current Administration Guide doesn't say anything about it.
If you only want to use Flash from within Chrome or IE10/IE11 then you don't have to install Flash from Adobe because it comes bundled with those browsers. So, the installer should not run at all for those users.
Other than that - I don't see an option to install Flash without PlayPanel.
Other than that - I don't see an option to install Flash without PlayPanel.