I skied in nothing but touring boots from 2012 to 2023. From Dynafit ZZero to Scarpa Freedom and Freedom RS, to Scarpa Mobe, to Scarpa 4Quattro (the stiffer one). I had perfectly dialed in semi-plug boots before this and they skied like a dream. But I fell in love with the lightness and walkability of the touring boots. We did a lot of impromptu slackcountry at Magic back when it snowed and not needing to fuck around with changing boots/skis was great (mostly had Tour F12s or Barons on my skis back then - they all have MNC alpine binders now). I thought the 4Quattro was going to hit all the marks...really light, great ROM, stiff, tight as hell (in a good way). Then milestogo gifted me a pair of perfectly fitting Lange RX and when I skied them back-to-back with the 4Quattros and I realized what I was missing all these years.
But I don't have the same use case as you're looking at. I doesn't snow enough to do much slackcountry in SoVT any more and my skiing is 95% inbounds lift-served with a few resort laps for fitness (or to go see the eclipse last year after Magic closed) and maybe a Chic Chocs hut trip every few years. I think you'd be very happy with the 4Quattros. You won't mistake them for your real boots but for what you'll be doing most of the time, you'll be happier in them than a 10 pound racing shoe. Did they have issues with the walk mode mechanism breaking? Yes, but I believe this year's version has a beefed up interface. I only skied mine for about 10 days before selling them to someone on here and there were no signs of plastic fatigue on either boot. What I didn't like about them was the lack of progressive flex (forward). When I leaned into them, it was like crashing into a bridge abutment. True alpine boots have a completely different feel that I prefer now.