Please be advised that using custom decay times in MRC can and will in too many cases negatively impact dynamics. The issue becomes psychological: you think it's better because you have listened to so many permutations and it must be better since you have played around for so many hrs with too many plots graphs times etc.

Firstly, adjust position of actual speakers in room and then adjust bass and other DSP settings. And then if MRC does not auto-generate go back to said more basic settings and tweak from there.


My strong advice.