For now, in the Registration responses sub-grid show the response for each Custom registration field that user submit on the event portal. Each Custom registration field response will be record as 1 line in this sub-grid. So the data of Registration responses will be multiply many time despite to the number of custom registration form you add in Event portal. For example: If user A register for the event that have 3 custom registration field, in the Registration responses sub-grid will show 3 line of user A. And when we export Registration responses as excel file, it's hard to see the insight of these data.
If we can export the data as Customer Voice response, all custom registration field is on 1 line of Event registration, that would be great.