What stereo are you looking at? If it's new enough to support the iDatalink Maestro
, using that instead of a PAC or Metra would retain the basic equalizer controls, fade, and the steering wheel controls.
If you're looking at a Pioneer, they claim to support the iDatalink, but it's the same vaporware BS they always pull. That firmware doesn't exist yet. Kind of like the "early summer" CarPlay update, or any other firmware update Pioneer has ever said was coming. You'd have steering wheel controls in the mean time, but the fade and equalizer would be as equally broken as anything else unless/until Pioneer makes good.