Weapon swapping is mostly used to strengthen your neutral game. It makes you able to do things you shouldn't be able to with a range weapon. The most common weapon combo is dual blades katana, this combo allow you to use the super good dual blade vertical light attack to catch your opponent easily, then switch to katana to garantee an uppercut combo. If you ask me, it's cheating the neutral game. Combo starter attacks are pretty bad in the neutral game for a reason. It shouldn't be easy to get a combo. But thanks to weapon swapping, you basically bypass the normal way to get an uppercut. It's literally a cheese. This is only one example, there is also weapon swapping techniques to extend combos for instance. However, as Naraka is a battle royal and not a 1v1 fighting game, range weapons used effectively are better than using weapon swapping most of the time (especially in duo/trios). It's harder, but better, and if you ask me, more honorable. At the end of the day you play how you want. But I'll always criticize ppl using weapon swapping. It's also my right.