I play on a massive TV and the default PS4/5 chat window on a fresh install is still tiny. Figuring out how to change its size (and - advanced technique - how to move it so it isn't weirdly 2inches away from the side of my screen wasting lots of space) was surprisingly difficult because it's not in the HUD menu and you have to use a mouse or the awful virtual mouse to interact with it, in unintuitive ways. I've always found that weird because getting the chat log to the right size and in the right place is the first thing I want to do in any MMO.

There are also a lot of UI elements which don't seem to be editable in the HUD menu. For example, the Diadem weapon gauge thing uses its own unique element which doesn't seem to be movable and lies directly on top of my other UI elements by default. That's annoying. And some elements cannot be hidden even when they are 100% useless, like the Sage Eukrasia icon or the achievement pop-up notice. The Focus Target components aren't customizable like the regular Target UI elements, which sucks when I'm healing or DPSing adds and still want to keep an eye on the boss. I wish they'd tidy some of it up or allow more customization.