Same engine doesn't necessarily meant the same problems. Game engines aren't a monolith solution - Source, for example, the engine that used to be famous for its physics back in the day, uses another engine to handle said physics.

So, the fact that Starfield is going to use the same engine (I don't know if it does, actually, I don't care) is not a reason to panic or be upset. For all we know, they may have updated many of its components in one way or another, including swapping some for better alternatives.

Having seen the entire Starfield Direct, I honestly do believe it's an upgraded version of the engine - it really looks like it doesn't behave in the same way. And, well, the new tech the devs can leverage allows them to work on some older engine limitations as well, resulting in a smoother experience overall, especially knowing what they were going for in this game.