While we're waiting for the new firmware i'm still playing with other wm1 regions.
after tried in these two days between region J and MX3 i made my choice.
MX3 fit better to my ears,both are amazing regions but mx3 IMHO result more defined,with more resolution and better holographic soundstage,unfortunately miss the OONF bass that region J owns.
i tried also region like CN,U,E...but despite they've (IMHO) super resolution,but they're too anemic,and the image result flat for my ears.
It would be great edited,modify the various region code and unite their strengths ,creating a definitive region mix,the cn resolution,the MX3 soundtsage,the J bass cadence,and the U detail rendering