I'm sure others have pointed this out already, but thinking back on all the times Katakuri has used his future vision this arc, there hasn't been a time where he really, REALLY needed it for some event to occur. Mostly it's just been used for hype and the predicting what people are going to say quirk, which is really minor. So (and this might be a bit of a stretch) could it be possible that Oda gave that ability to Kata primarily so that Luffy could get it himself, as the most recent chapter confirmed Luffy's going in that direction?
But even then, personally, it doesn't make sense how this is supposed to be better than regular CoO. Predicting what your opponent in going to do next in a fight is the entire point of regular CoO (well, that and magic radar, when Oda feels like it). Katakuri has used it outside of battle with stuff like beaning Jigra and seeing Pudding fall, but since this seems to be a combat power-up for Luffy, I don't think the main purpose of it will be in situations outside of fighting. So, thinking about how seeing the future improve Luffy's fighting in a way regular CoO couldn't, there was one time where regular Observation was ineffective; during the fight with Enel, Luffy was able to render mantra useless by turning off his brain and by launching attacks (the gatling against the ship) that weren't intentionally aimed at Enel, which was way more effective. Assuming Oda stays constant with that, and I'm aware that might not be the case since he hasn't exactly been 100% consistent with CoO use, predicting the future could work where CoO doesn't in cases where attacks aren't intended to strike the user.
Still, cases that like would be incredibly situational, not something Luffy would need to regularly deal with. But, and this is a nearly baseless guess, what if part of Kadio's fighting style in his regular/untransformed zoan form involves getting drunk and rampaging around wildly, not intending to hit any single person with any particular blow, making his attacks impossible to predict with regular CoO and thus harder to dodge? Luffy, with his newly acquired monado visions future sight, would have an advantage compared to the other SHs/Supernovas in dealing with raging drunk Kaido, letting him take center stage in the battle alongside the likes of Marco, who would also be better at dodging because…he's just really fast. Something like that.
Or I'm completely overthinking this and Oda just gave future vision power to Katakuri and Luffy because he think's it's cool.