Do you have any idea when the GraphQL API will be accessible via POST?
GET really is too limited and we've reached a point where it really has become a pain to work with even though we still don't have that many slices (request URI too large). All the things GraphQL is supposed to make better are now mitigated by the fact that we spend all our time splitting things up, and going in the exact opposite direction of what GraphQL is made for.
This is definitely something that would make us consider using another CMS in the future if it isn't seen as a priority on your side at all, and I think other people feel that way too... I understand that the feature is marked as Alpha, but when this is one of the first features advertised on your homepage in the hero section, I believe it definitely should at least work the same way any other production ready GraphQL api works