They probably did this because of the same issue, to ‘force’ split each argument out, so effectively a set of Append To List activities inside an Invoke VBA scope.
Not sure why it needed to be any different though to the interface for the argument mapping for Invoke Workflow or add log fields where you can create a table.
The new coding area interface for Studio just seems to take up an inordinate amount of unnecessary white space and space generally. It’s like they’ve made it look like a simple app on a phone for children. Hey ho.