DMN11 — output data symbol & comment symbol missing in DRDs

Please add an optional output data symbol and a comment symbol, which I both urgently miss, as discussed in the LinkedIn DMN group at
https://www.linkedin.com/groups/Why-no-output-data-symbol-4225568.S.5976658175284244483

Summary: Why is there no output data symbol in DMN 1.0's DRDs?
Decisions have results, which may be complex, and currently their output data may only be indicated by the decision's name (e.g. "determine X": output is X; "check X": result is Boolean). That is not very clear.

An optional output data symbol would make decision output graphically explicit, and provides for symmetry.

DMN also lacks a comment symbol which could otherwise be used for this on DRDs.

add text annotations in DMN11-99 but decline to add output symbol

output symbol seems redundant with existing decision symbol (an decision has always exactly one output) and we don't want to clutter a large DRD