[Filligree]

They've said they won't have blueprints.

Now, granted, they might change their minds -- but it's hard to imagine how blueprints would work. Factorio is played on a 2D plane, with few obstacles in general and none that can't be removed; Satisfactory is played in a 3D world with immutable obstacles.

The game is tuned towards not needing blueprints. You don't need large quantities of anything, just a small amount of every item -- the complexity scales up, but the scale itself kinda doesn't. Yes, some players will attempt to turn the entire output of the map into turbo-motors, producing exactly the right amount of every ingredient, and will build their factory in the sky to avoid dealing with the terrain--

And yes, blueprints could be useful in this specific case. But that's not most players.