Only if you need the clearance. Realistically, I think it's safe to say the majority of us would be find ground clearance wise in a mazda 6. Personally I value the internal volume (main factor), the AWD (I don't like failwheel drive, Mirage is an exception) and the optional towing. When I had my H&R springs (higher than mz6) I've never once felt that I needed more than a sedan height clearance when I've taken my car onto dirt/country roads. With my current setup I just have to be weary large dips and angles.
edit
Forgot this was for the 2017.. mods haven't caught up with it yet except some probably expensive coils out of japan...