Hey there. I'm the PM for Pages. That's fair feedback (though a lot could have changed even in the past few weeks, so I would recommend taking another look)

- It's hard for me to tell what's causing the issue (the build logs should give an idea of at least at which stage). One thing we've added over the course of the beta is connection to GH comments, which requires a new type of permission. So that might be causing the failure, but also, failed builds should result in a comment (and email) for notifications, depending on your GH settings. All of that said, my email is rita at cloudflare if you want to forward me more details, I can help look into it.

- Creating a canonical notion of your domain is something we're thinking about. Right now the preview links will set X-Robot-Tag so they can't be crawled but yeah, ideally we want to give you a way to remove myproject.pages.dev if you're not using it

- The cache-control settings are intended to keep your site from serving stale content by relying on etags — your browser should still serve from cache if the asset hasn't been updated. On the Cloudflare site, we have much longer TTLs.

Anyway, thanks for trying Pages! We're continuing to iterate on it, even after GA so should only be getting better :)

(edit: spacing :P)