Audyssey is already planning the next round of features for MultEQ-X. Here is a list that we are aware of.
Audyssey MultEQ-X – Upcoming Features Beyond v1.5
Setting Up Dirac Live Loudness Curves on Denon / Marantz AVRs
I go through the process I took to configure my Cinema 50 for Equal-Loudness Curves with Dirac Live. You can do the same with your Denon or Marantz AVR.