I think by offhand glams they meant things like Whm and Blm being able to use their 1 handed weapons for glam

I BOUGHT the godforsaken Mog's Staff the day before they patched "all 1 handed weapons" into a 2 handed version [like the old allagan casting weapon used to be 1 handed too] Except they omitted the Mog's Staff and it's been rotting in my storage for like 7 years or something.

tried logging in to play around with glam yesterday and it ended up just making me feel kinda sad lmao