Yes, it would be great if they communicated a bit more. Or just released some old live shit or whatever on YouTube. It would go in line with Bruce's remarks about having a "special relationship" with their fans and whatnot.
But as they, or their social media team, whatever, don't do it, I'm ok with that. Obviously, I'd want and like to see more, but simultaneously I don't really bother to waste too much energy and effort to feel angry or disappointed about it. I understand those who do, but it's more of a "meh" thing for me.
Given their usual formula with the announcements and whatnot, they usually want to deliver something specific. Announcing that there is an album they'll tell more about later and release it when the LOTB III has quite a bit of loose ends and unspecific stuff for Maiden Marketing Machine. They - presumably - want to give some exact dates and details or nothing at all. They want to give 100% spotlight to the album, with no Legacy of the Beast cycle or anything else underway. I'm very optimistic about them having a tour or two left in them, but anything can happen. Maybe Nicko will, for reason or another, drop out from touring after next year's LOTB dates. They want to be as sure as possible about their plans for the next year or two before they'll go out with a big announcement, as the new album & tour announcement will (I assume) go more or less hand in hand.
Besides, assuming they wouldn't announce title, artwork or anything quite yet, before LOTB is done, it wouldn't have that much informative value anyway to give it away that they've completed the record and just sit on it. Hardly anything new for us who know/assume it's done and for the others, I think the shroud of mystery and uncertainty, spiced up by vague rumours about the album #17 being a thing, works just as well, if not better than posting something along the lines "yes yes, it's done, we'll release it next year, bye."
Obviously, these are just my thoughts and pointless pondering.