I really wouldn’t call the communication you are referring to as real communication.
What does ‘We will be introducing Raid shields in version 15!’ communicate? Maybe I, and several others, missed it, but I’ve seen no further information or clarification regarding this, and people just had to speculate. I didn’t see any response to these speculations, and/or any preview of this feature in the thread you refer to. And when the topic (and concerns) was raised in beta, there were no SG comment, further information or clarification.
Maybe the Raid Shields are, somehow, related to the under-development ‘raiding related new feature’, which has been suggested – but that’s just further speculation. Because there’s no more information given. And I think it would be a really bad decision to implement a (seemingly) weird feature because of a future change or addition, if that was really the case.
I don’t know if you’re a beta tester, but there’s really not much communication going on – often not a big problem, but sometimes… Sub-optimal. Or worse. But that’s only my experience and opinion.