Earlier this year I changed my 2020 RX Takumi for a new NX 350h Premium Plus with Pan Roof. I, too, had some concerns beforehand, but I am so pleased with the NX and delighted that I made the switch. For us, it's the perfect size, quality, spec, performance - pretty much ticks all the boxes actually. It's a better size for us living in rural area, whereas the RX was just too big (although I miss the sound of that V6). As for performance, I don't notice any difference and it's just fine - plenty of power. My wife loves driving the NX more than any other car. Me too.
Not sure if this helps - best of luck whatever you decide.