Tred’s post wording in regards to biomarkers seems ok to me.
The biomarkers are as you say specific to how efficacious A2-73 is, although it seems only by a small margin, depending on the wild type vs. specific variants of the COMT and SIGMAR1 genes regardless of indication.
I think the genetic biomarkers will help in validating A2-73 as having predictable features and possibly provide further insight to neurological disease pathways, which can’t be bad for regulatory approval. How clinical meaningful those biomarkers are remains to be seen.