To be fair you, and me and others moaned when Chibnall never seemed to hype the show!
For Chibnall, it's not a direct comparison. For his era, the lack of hype generally meant that he was keeping big things under wraps and not wanting any leaks or teasers, and/or wanted the audience to see for themselves without the advertising previous showrunners had and react the way they wanted.
There might be other reasons, but I'm going by mere perceived inference for now.
Yes, it was disappointing that we had little in the way of teasing during his run. Yes, it was disappointing that the actual episodes weren't as gripping and enthralling as hoped. And, yes, the lack of it made the episodes with big reveals and good stories that much better. "Spyfall", "It Takes You Away", "Fugitive of the Judoon", and others wouldn't have had any of the impact had there been big teasers or big statements making big claims.
Nor is it the late-80s and 90s when Star Trek TNG teasers gave away all the goodies, sans build-up, for many of its episodes. But, back then, fans of Road Runner cartoons knew the coyote would run off the cliff and they'd laugh anyway - meaning the teasers for the TNG episodes showed the proverbial cliff pratfalls, but what led to it remained a mystery and those reveals still generally paid off as, 38 years later or whatever, we're not hitting the FF button to get to "those good bits", we loved the whole episodes even if some of the good bits were spelled out. Indeed, here's one example from TNG that didn't have fans running around shrieking "SPOILERS!":
I'm amazed they didn't show Picard as Locutus! But knowing those snippets in advance honestly didn't alter much of anything.
Or a lesser example:
Dang, Yar returns? if I hadn't seen that teaser beforehand, I - like everyone else - would have peed my pants in awe and excitement!
Or this:
To be fair, that one goes out of its way to try to lead the audience down the wrong path...
But to make up for all those:
Yup, another potential pants-peer moment ruined thanks to that teaser giving it away even easier than my ex had, on Staaaaaaaar Trek The Next Generation! (But we watched and were captivated by what led to the reveal anyhow as we didn't really know when the scene(s) taking place took place.)
But it's not 1990 anymore and it's an interesting experiment to see if a show really needs teasers (risk of spoilers or not prevailing).
