The dimmer knob effects dimming both buttons, but at its highest setting...the mirror defrost button is still brighter than the rear window defrost. I get that the front dash is more "in your face" than the center console though, makes sense to have controls where you can easily see them. However, isn't that why we all here have a VX...challenging the norm and being different?
No matter where you put the buttons, it is a slighly involved task for sure...not a five minute deal. Not to push you more into procrastination...the end result is well worth it.