Is there anything we could be doing to serve you better?
Yes, let me run datastore on my servers. Surely I may use your cloud offer but in certain cases I need to run it on my servers. I can't build/invest in tools/drivers for a proprietary cloud service.
I already tried it...it looks good on paper but bad in practice. Think of a graveyard where appengine go.
Be the change you want to see
I think it's not worth it. I rather not use Datastore for anything from now on. You have to cut your losses at some point. We are using microservices so it's not hard to make the change(though we loose some tools we designed for datastore).