I'm just saying that a *lot* of work went into the fglrx power management, and that even matching that with the open source drivers is going to take an equal amount of work, it's not something they can just "keep".

If the radeon man page doesn't mention the power saving options, then either your radeon driver is too old (the options were added in April 2009) or your man page has somehow become out of sync with the driver. Can you check the version/age of your radeon driver ?