Alphinaud is my favorite of the two twins and I have no problems with his development such as it is in the game. I've liked him since his introduction as an arrogant little dipstick in ARR, through his journey in Heavensward, and beyond as he settles into a more diplomatic role. I think the game was smart to allow him to take a more subdued position in Stormblood, but I do miss him feeling like he's one of my "core" party members. I have my issues with the Scions in Endwalker, but I think Alisaie's speeches were more egregious than his as far as any complaints I might have.

I am relieved they haven't brought the twins back into the story yet after my Scions overload but I am slowly reaching the point where I'm getting curious about what they've been working on in Garlemald and, when we do see Alphinaud again, I believe it'll be a happy reunion for my WoL.

In short, I don't agree that Alphinaud really needs "fixing" in the first place.