I felt the same way coming out re: it felt like DV just decided "well, it's basically the most famous sci-fi book ever...so yeah, this one's for the readers out there!" My borat voice wife hadn't read it though, and watched it on hbomax while I was out of town, and she shot down my theory. Said she got all the bene-gesserit stuff and the conflicting future visions just fine. Plus she likes PJ Harvey and Sonic Youth so I married well but that's beside the point.
I went in hearing Chalomee was flat and not great and maybe it's just because I like him as an actor and have the background of his actual charisma onscreen (so good in Little Women!) but I thought he was right for the part and did good...for Part 1. We'll see how he holds up as the spoiler alert leader of [gestures at everything]. His performance reminded me of my friend who is the heir to a very large company and has been raised from birth to eventually take it over--that weird combo of entitlement, wealth, but weariness at the fact that he's going to be responsible for all these thousands of people under him. So as far as hitting "good looking marin rich guy with stressful job" he nailed it lol.
As for DV as storyteller I'm mostly with you all. I feel like his apex as a traditional storyteller was Arrival--I don't usually like twists or flashbacks (and especially not dead kids as character explanation!) as narrative devices but felt like he really fucking landed the story there along with the spectacle. Bladerunner I found beautiful but boring--though I think I'll give it a rewatch soon. Sicario is one of my favorite movies of all time, and I think whether because of or in spite of his narrative questionability, the fact that it feels so propulsive yet cloudy as to what anyone is *really* trying to do until the last 20 minutes--even whose story it really is!--is what makes it so different and compelling. Prisoners is basically beautifully shot genre stuff that would be blah if it weren't for Deakins as DP and Hugh Jackman giving an unhinged performance. (Seriously, there are times in that one where he gets so loud it blows out the levels on the microphone, but DV left those takes in; there's also a few times where the other actors look shocked and surprised by what he's doing in the moment in a way that feels real.)
But yeah, his strength is really conducting all these things at once--the best DPs, composers, visual effects, etc. and having them all work perfectly together even when the script and performances get clunky here and there.
And you're right, if someone went into this hoping for a TC + Zendaya planetary romance they'd be pissed!!!!