I wouldn't exactly be all that surprised if Elder Scrolls 6 is at least somewhat comparable to Morrowind just because of other games. There's a few things that are just too big for them to ignore. The biggest of those is Red Dead Redemption 2, which has a weather system where you have to dress depending on how hot or cold it is. Likewise Breath of the Wild has this too, so weather actually having an effect on you seems like it'd be a pretty sure thing...especially since both of those games would've come out before development on ES6 started.
I'd assume Dark Souls is going to have some effect on this. It's one of those no brainer kind of things where it's like: Oh, you could just left this wholesale and drop it in and Elder Scrolls combat would be improved. It's kind of like when BioShock came out and the Plasmids seemed ripe for Bethesda to pull from for whatever their next Elder Scrolls would be...which they did in Skyrim. It wouldn't even be a major change to their combat system either, at the least it'd just be you now use stamina for all attacks instead of just the power attacks. If they do that, and I'd be surprised if they didn't, I'd guess some weapons that haven't been seen since Morrowind and Daggerfall come back too. Although unless they get someone that actually knows what they're doing when it comes to combat design it won't amount to any kind of major improvement, but it'd still be better than the total mess that was Skyrim combat.
Because of what other high profile games have been doing the past half decade now I'm thinking Elder Scrolls 6 will have options that haven't been seen in a Elder Scrolls game since Daggerfall. Climbing is surely coming back. Wouldn't be surprised if Carts come back. Maybe ships are actually functional because of Assassin's Creed if their shitty engine can handle that. If they're still want to keep things simple, but not as simple as nothing at all I can see something like Daggerfall's Special Advantages and Disadvantages return as a character creation perk system. In general I can see a lot of stuff happening with it for no other reason than a handful of other high profile games from the last few years that are now in their wheelhouse and do what Bethesda does far better, and that stuff being more in line with their pre-Oblivion games. I don't know, maybe they'll spin it as some kind of return to form.
There was also some location I've seen in Fallout 76 stuff that looks like, after all these years, Bethesda is finally ready to do weird Morrowind kind of location instead of the most generic of locations they've been doing since Morrowind. So maybe that carries over into ES6 too.
I don't think they actually know their games are shit.
When you sell 20 million copies, would you even care?
Well I'm sure that plays into it. Why fix what's broken when it does so well, and so many people (and reviewers) tell you you're great? But if it's shit you also don't really know when everything will turn around on you. If it was just a fluke. And given the sales of Fallout 4 and 76 they should really fucking care about how shit their games are. But like I said before, I don't think they're actually aware of how bad their games are. That's been the general impression I've gotten from Bethesda for years, and that NoClip look into Bethesda painted a picture of complete unawareness.