With the European fan fest two weeks away. I thought it was appropriate to bring back this topic.
First I decided to look at Corsair gameplay from ff11 and their general gameplay or rather...their unique trait is to gamble aka astro cards. This is extremely similar to astro in FFXIV and as yoshida said, he likes for each new job to feel very unique. So corsair core mechanic just wouldn't work and the jobs in FFXIV at least carry over a lot of unique traits from the original job.
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Such as - Rdm using black and white magic, dragoon iconic jumps, blue mage learning monster spells. Sage being the only outlier as sage was never unique to begin with in the FF series as it was just an upgraded rdm.
So with Corsair main unique mechanic being similar to astro, that is one big reason it's not going to be added.
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Second reason is Mch was created in response of Corsair. Back in HW yoshida said he created mch due to people wanting a gun job because of the relic that is 1.0 assests of the corsair sign still being around in lominsa. And we know that there are NPCs that are Corsair such as the city state leader... Corsair is a full ranged job. Proof of this? Because we seen her fight in the endwalker story to save lominsa, she was pure ranged along with her master.
Third reason is it makes no sense to be a melee fighter if the main weapon of Corsair is a gun. I know some people are going to bring up ninja ninjutsu being ranged by that makes more sense than shooting a pistol/hexgun or a musket/rifle in close range. It'll just look EXTREMELY silly and kills the whole point of it being a ranged weapon.
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Corsair main weapon is their gun and their sword was secondary..and speaking of their sword. They use a cutless, the sword shown in the endwalker trailer was a short straight sword. Nothing a pirate uses, even in the game we see pirate enemies used cutless. Even in FF11 it says they use ranged attacks more for most of their damage. I don't see CBU3 completely changing the way corsair works when one...they already exist in the game as full ranged fighters and two they don't use any swords in FFXIV lore.
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Just like geomancer, they're not going to make the job payable to players since it's already an established thing in the lore.
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So that's pretty much all I have left to DISPROVE further it's not Corsair . With that said that's all this is speculation but the idea it's hard confirmed it's Corsair has made people VERY hostile if you say it's anything else which is surprising to me.
If there is one thing you should always do with non confirmed jobs..is raise your expectations so high you think it's confirmed. This happened before in stormblood when everybody thought lyse was a dancer... Then again when everybody thought dancer was going to be a healer but turned out to be a ranged DPS when it was first announced during ShB.
The same thing is happening with Corsair so no, Corsair isn't a HARD confirmation and we'll all see in two weeks.