When you choose to use a third-party addon, you are trusting the developer of that addon for long-term maintenance. If they give up on it for any reason - which they are perfectly entitled to do, especially if it's free - then it won't be supported any more. You should bear this in mind when choosing to use third-party addons.
The entire purpose of the addon SDK is to allow other developers to implement more features than we have the resources to do ourselves. It is not generally feasible for us to officially reimplement any particular third-party addon, and besides doing so defeats the purpose of the SDK.
The Addon SDK v2 ought to have the technical capability to support this - it supports all officially supported APIs from the old SDK, and if any are missing, we will prioritize implementing them.