Add an option to collect Name and Email
The on/off setting to collect the Name and Email would be a great help to the form. We can avoid these options in survey and focus only on Survey questions.
In further we can couple of fucntionalities as follows
1. Avoid duplicate response with same email
2. User will have ability to update the response by sending an unique link as part of survey response.
3. Email validation ca be done.
4. Have an option to email validation to avoid unnecessary submissions.