I think the vast majority of issues related to the Fatip Slant are mind over matter: If you don't mind it doesn't matter. Then there are issues like the blade getting stuck on the cap, or more blade exposure on one side no matter how hard you try to tweek it. Those are issues. Curiously, my FOCS had more blade exposure on one side, but if I turned the cap around it's perfect. I could tweek the side that's off and it aligned, but it was easier just to turn the cap around. That issue has curiously cleared up over use. Now it doesn't matter, it aligns either which way. Almost like it got broken in the more I used it. Then there is the pin ring on the top of some caps, or a little lift on one of the corners of the blade and baseplate. Those don't affect my shave, so that's mind over matter part with Fatips. I'm batting a hundred having well over 30 Fatips. Some have there own individual little quirks, but they all will align and shave wonderfully. It certainly sucks to buy one that is seriously flawed.
the beauty of Italian manufacturing: might not be perfectly done but boy isn't it great!
my 2cents on the matter, I have 3 fatips and I don't have any issues of QC except for the grande cap where you slightly see the pin (not an issue really, barely noticeable, and I always thought I caused it by over-tighten it). Honestly, they are 30eur (or USD) razors. For the way these things are produced, it's to be expected that you get some lemons out the line.
Also, having some first hand experience from a similar kind of Italian quasi-artisanal production (shoes in my case, but still...), factories like Fatip work in a less structured and organised way that you would expect. It wouldn't surprise me if it's Mr. Fazzini in person inspecting razors by himself down the line when he can...