Name something more immersion breaking than the new ishgard glamour

[Granyala]

Honestly, I don't see anything particularly immersion breaking about it.
There is 0 reason why Eorzeans would be incapable of coming up with the design or manufacturing the fabric / sew the clothing.

Immersion breaking to me would be something that cannot be produced or conceived by the indigenous population of the planet, which in a game like FF-XIV is almost impossible because we have several high tech cultures (Ancients, Allagans, Garleans) that could have had the idea and the technology to make it happen.

Face it: FF-XIV is not your traditional western medieval fantasy setting. It's a mish mash of times and technologies and magics that makes virtually everything possible, including fighting a giant dragon in a bikini or a frog costume.