I believe it amplifies some of the worst aspects of their games. If I think back to what I liked about Oblivion, it was a world that felt lived in. Objects had purpose, characters had homes, content was discovered. It relied a lot on procedural content, but it felt like there was a strong level of cohesion between the procedural elements and mechanics. The disparate aspects of the game fed into one another. With Starfield, you get this huge increase in scope, but each individual part feels kind of empty and boring and clunky and slow.

Here's a contrasting example:

In Oblivion, imagine if you wanted to steal something from a vendor. You have to wait for night, you have to pick the lock, items have actual value, you have to stealth in case they catch you, you know if they can see you, there are other things to do in the city in the meantime, and during all this you might find something unexpected along the way that completely tangents you off into a different direction. All these elements come together to create interesting player stories, and none if it needs to be tied to any guided narrative.

In Starfield, all of these elements fall apart. The scope of the game means you're constantly fast travelling from location to location. No single location has too much going on, and half the time what is there is sending you back out to space anyway, so you never really feel much connection to any physical place. The relative value of items is totally skewed because of the scale of ship related expenses compared to anything else, so what's the value of stealing a cool rock? It's also very difficult to tell relative weapon/item quality at a glance. I know that a steel sword is better than an iron sword; I have no clue why a Reflective Terrablazer is better than a Targeted Blurgun - and the default weapons usually don't matter anyway because I would much rather have cool modifiers. The stealth and lockpick mechanics are both behind skill tree unlocks, so you're far less likely to engage with those mechanics in the first place. The shops are all open 24/7 (I think? honestly don't even know) so the day/night cycle seems irrelevant, so sneaking in to the shop is a no go, and I feel pretty limited in lockpicks and don't really know where to reliably buy than a few at a time. And you never, ever, find anything surprising or compelling, and if you did it would be reduced to a quest checkbox.

So to summarize: I don't know who I'm stealing from, I don't know why I would care to steal anything, it's not obvious how stealthy anyway I am unless I skill into it, it's not worth using my lockpicks, I'll never be caught, and their door is always open. There's zero motivation to actually engage with the world in a way that makes it feel alive. But it's critical to note: all those systems are still there! You can do all this stuff in the game! But because of how things are structured, even though the game on a fundamental level is extremely similar, the way you interact with it is totally removed from the kind of emergent fun that makes exploring those worlds so fun. It's just a smooth path of monotony to the next thing. The systems often amount to less than the sum of their parts.

Now I'll admit, some of this could be on me. Maybe I've changed. It's possible. But man, I tried. Hey, what's that cool cave on this planet? I'll go check it out! Oh uhh, it's nothing? There's... a dead crab and a box with some old glue? Okay I guess?