I think you are all jumping the gun a bit here. HM-NG is still in active, iterative development. It is, for example, not yet available for on-premise installation.
Once open for third-party consumption, APIs quickly become fixed and encumbered as dependencies are taken on them. This usually puts obvious constraints on the development process so it is important to get them as right as possible and complete first time.
My advise would be to wait until things have settled down before asking for this therefore. For me, this will be when there is feature parity in all the important places between HM and HM-NG and an on-premise version is available.