Hindi po ako expert. It just so happen na nakabisado ko ang Pio 1020 ko sir. pero honestly, yun advance MCACC, hindi ko ginalaw beause i'm satisfied naman sa personal calibration ko. The big advantage of the advance MCACC, i think, is the multi seat calibration. It's doable naman via manual calibration. But once na nag-multi-seat calibration ka, expect na mabawasan minsan ang SQ sa listening position mo. Kung madalas ikaw lang ang nanunuod and ikaw lang ang critical makinig, i would opt for the single seat calibration.
With your current speakers, i wouldn't worry too much on power. Napakadaling i-drive ng mga Klipsch because i use to own an RB-81. Pero for future proffing, iba pa din yun malakas na amp. Maganda ang mga proprietary class D amp ng pioneer. Nasa Elite series nila.
Yes, try mo muna factory reset. Then calibrate ulit (automatically stored in Memory 1). After calibrating, you can transfer the data from memory 1 to memory 2. From memory 2, you can tweak it na according to your preference. Pero kindly check na din if this is possible with your cyrrent receiver. Hindi ako gaano familiar sa features ng new receivers ngayon pero with my Pio 1020, kaya naman. If possible, at least may memory 1 ka na auto calibration para may reference ka for future tweaking.