Is phase control switch a deal breaker for you?

You do not need a polarity switch. The great majority of people cannot hear reversed polarity differences. Just one more thing in the way of music. Forget about it

It's not so much whether or not you can hear it. It's whether your speakers LET you hear it (or make it unavoidable).

Dopogue, is Gallo's low-pass filter a 1st order crossover?

There's no crossover between mids and highs and just a single capacitor between woofers and mids. They're crossover-free from (I think) 150hz up.

I have it on my Wyred 4 Sound Dac2 and Integrated amp. I can almost always hear a difference on my recordings and have a preference one way or the other for a given recording. I switch from the listening seat via the remote so I don't need to get up and down and the reversal is instant. Since the reversal is done in the digital domain, I don't think it affects the sound quality at all.

I have another "more pure" system without polarity reversal and I really miss having polarity reversal in that system.