Hi @James_Guilfoyle1, your question came at the perfect time! 
We’ve just launched a new Request Tracking feature that addresses exactly what you need. Now, form submitters in your organization can reply to form submissions via email, even if they don’t have an Asana license.
With the Send email replies option, you can send comments via email to the form submitter. They can also reply via email, and their responses will automatically turn into comments in Asana.
You may need to tweak the smart workflow a bit, but this should work perfectly! 