Yes all of this is true and yes my center is matched with my mains, and placement is ideal.
I recommend toggling back-and-forth while watching home theater stuff if you can configure things correctly and you will really see the difference.
I rarely use center channel with processor
I set up my processor, nad m17 v2i, so that I can alternate between six channel or five channel(without center). I’m finding that my mains which are B&W 802D3, don’t really need the center channel for most streaming. I am biamping with tubes and solid state so that may be helping the quality
The vocals come through just fine on the main speakers. Overall things sound better. It’s easy to toggle back-and-forth for purposes of excluding the center.
Does anyone else not use a center speaker because it is better to use only the mains? I will admit I occasionally use the center channel sometimes when I need the vocal sound to come through better but it rarely happens.