I’d like to participate in testing of this. Ideally the functionality could be calibrated to vary the Thanks Page URL based on the source of the form.
For example, if the form is on a CONTACT US page or on a BROCHURE page, the Thanks URL would be able to be different. This would reduce the volume of duplicate forms and keep any implementation neater and easier to maintain. This is especially the case for any businesses that are opertating multiple brands out of a single HubSpot instance.