They want to push the content as fast as they planned and they want to control players’ progression along with it. Idk what’s up with the drops because I wasn’t able to find any official information.
It depends? NA version of lost ark is very unique in its current status. So they could do whatever to make the game better and at least help prevent the potential problems that could happen. For example, experienced players could’ve taken advantage of people with less or no previous knowledge. Let’s say they were tradable, some people could’ve paid extremely over-priced gold for that 2 lines of level 1 tripods.