If you go down the GraphQL path be aware you are trading the simplicity, flexibility and universality of HTTP, which you can debug via cURL, to a custom protocol and fat client owned by Facebook. It isn’t even an open standard. The last time Facebook tried to make HTML better we got FBML, remember that?

Be wary of tech that promises to solve all your problems that you yourself don’t understand and haven’t solved. You’re going to end up with at best another set of problems.