We need a Rebar Set Count parameter for Rebar Tags.
When you have two identical sets on the same span, the multi-rebar tag tool will only show one tag, even though both sets were selected as hosts for the multi-rebar tag. That could lead to quantity errors, as we have twice the quantity of rebar set bars.
Above is how it is now:

To work around this behavior, we add some text from the "Comments" parameter to force the multi-rebar tag to separate sets with one tag for each of them:

But the tool should be able to do this:

where "2" is the requested "Rebar Set Count" parameter and "x" is a suffix.
This request also appears on the Revit forum:
https://forums.autodesk.com/t5/revit-structure-forum/multi-rebar-tag-combine-similar-rebar-sets-in-o...