Future Sight was never intended to be on Luffy what it was on Katakuri, take a minute to digest that fact.
It was always a mismatch and unfitting power for Luffy.
It is not compatible with his character and it is not compatible with his G4 Snakeman.
Oda had to use tons of mental gymnastics to keep Luffy alive, at the expense of top tiers who should have killed him many times.
Now, with FS, he can avoid it and make it plausible since it is an actual ability in the OP verse instead of using mental gymnastics.
The perfect solution to all of Oda's problems and also can serve to create amazing cliff-hangers.
For example, at the end of a chapter we see someone die, for example, Luffy and we are left a week or two with such idea.
Only to find out in the next chapter that it was a vision through future sight. It's bound to happen sooner or later.
From the writer's perspective, Oda gains nothing if Luffy is 1 step ahead of his opponents, cant be an underdog like that.
Future sight will be used here and there, when Oda needs it and wants Luffy to flex on fodder or avoid a critical situation.
Other than that, we can consider Luffy's FS as basically non-existent.
It was foolish to expect Katakuri v2.0 level of performance in the first place.