I'd be fine with this as long as it is a natural fit and not forced awkwardly. Like we need a fitting culture to use said weapons that we, as of yet, don't really have. Rauatai seem sort of eastern in some ways; I get an Ottoman vibe from them. But as far as far east we don't seem to have a proper culture for that yet. So unless they add one in I don't want items of said cultures; nothing is worse than a forced theme or items when they don't really fit.
Personally I could take or leave such weapons. They aren't my style in general. If added I hope the katana is a two handed weapon (maybe like a two handed saber in function). We would likely need to pick and choose which weapons would be added as they are unlikely to ever add a full selection of new weapons from said cultures.
However, there are many weapons from said cultures that could be placed in the same class as existing weapons in terms of function but with their own different look. For example, the Chinese jian is a double edged sword like the normal sword in game. The Chinese dao is a single edged sword like the saber and indeed some variations of the dao are called sabers in english. There are plenty of daggers in other cultures, spears and polearms, etc etc. So it wouldn't be hard to integrate many such designs into existing weapon classes, I just wouldn't expect more than one or two new weapon classes if they did decide to add oriental cultures and their weapons.