We have received your feedback!
Preview links are a great opportunity for your team to review and give feedback on the work being done. We recognized this when we built the feature, but every change you made went automatically to these links. Because unfinished work went there, it wasn't ideal for reviewing.
We've now changed it, and preview links work exactly like production (with domain) links.
Hit publish, copy the link, send it to your teammates, get reviewed and suggested changes applied, then hit publish to production!