Now using accessories necessary for the job is a problem?

People are really nitpicking. It just further enhances her eyesight,which was already superb(just look at her first scene in Zou).
It's like saying that Nami is bad at Navigating because she sometimes uses a map.
But she did a good job in WCI,with multiple observation haki users around on the ship,she was STILL THE FIRST ONE to notice stuff multiple times,like for example the BM pirates trying to pincer the Sunny.
And as i said,it's a fact that her being a lookout would make the SHs fix their sleep schedules,she brings some Quality of Life updates for them

As
@Kafkananta said,she doesn't have to be the best ever at it,just good enough to give the crew some perks,that's all we need at this point,after all, WE GOT SO FAR without the need of helmsman or lookout. Also her desire to see the world together with taking the role of a lookout,who literally sees the world is perfect.
Yes, it´s not that hard people, let´s not beat around the bush.
"Nitpicking", it´s a standard Oda has set himself for the Strawhats, it´s useless and plainly wrong to pretend we are nitpicking in this.
Look at the quality of Strawhats in their respective roles, the only exception to this is Zoro really who was not one of the best in the world but who is also solely concentrating on combat.
Sanji = best student of a world famous chef, is even surpassing the skills of the chef who is feeding the biggest glutton in the world
Nami = impressed Grandline citizens with her skills to recognize even the smallest changes in humidity and weather phenomenon, even impressed the scientists who have dedicated their lives to study weather
Usopp = has shown sniping skills from places people can´t even see him, and they deemed it impossible to achieve what he did, Sanji literally pointed out that Usopp is by far the only dude to do this in Enies Lobby
Chopper = stems from the place which is world famous for its medical technology and knowledge, and studied under the best doctor in that place
Robin = Only person in the world who can read poneglyphs
Franky = One of the two only students of a legendary shipwright
Brook = Plays every instrument to such a degree he can even hypnotize people, and now is world famous
Jinbe = as fishman uniquely qualified for recognizing currents and manipulating them for their advantage, and is even teh best of the only fishmen pirate crew since he was doing that
Literally no other Strawhat can do what these guys are doing in their respective field. Nami can cook, she can´t make up a dish and cake that makes the world´s biggest glutton foodgasm. Usopp did his best at fixing the ship, he can never replace Franky as a shipwright.
Franky plays guitar, does not have the music skills Brook has. And this pattern is consistent throughout.
And the Strawhats are not only exclusively enabled to their respective roles within the crew, but they have world class skills in those fields that either nobody else or a handful of people have.
The problem is not Carrot using goggles, the problem is Carrot using goggles to the same proficiency as any other Strawhat can, and this was once again proven in WCI when we literally had several characters do the exact same thing.
Jumping high? We have Robin who can instantly create doubles of herself at places she can visibly see, we have Sanji who can not only jump as high but can stay indefinitely in the air, especially now with the Raid Suit, Chopper at least used to have jumping point.
Everything Carrot can do, other Strawhats can, maybe even better in some cases, and that´s only within the Strawhats.
If you look at the world, like i said, world´s best lookout by far remained in Dressrosa due to her ability, there are a lot of people who can fly and get to altitude faster than Carrot ever could with her jumping.
So please let´s not pretend Oda would not break a very obvious pattern if Carrot is supposed to fulfill that role.
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I would say robin can do a far better job as a lookout, oda already firced Jinbe as the best helmsman, well there is nothing for us to argue against that role, but he can't do that with lookout. Since robin can effectively use her DF for lookout in a far better way.
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I dont think SHs need a role based recruitment at all at this point. Oda should just concentrate on plot and character based recruits
Yep might be. Jinbe with regards to his dream and his flashback was also not that personal.