I don't really understand why it has to be "level." Are people incapable of moving past anything? Currently we are essentially skilling up weapons as our main source of progress. Makes more sense to denote our progress as "weapon ranks" as opposed to "weapon levels." Just like it makes more sense to be gaining "skill points" instead of "experience points."

It really doesn't matter to me what they use, the difference is really irrelevant. I just don't see the need to change something that has been in the game for a year now just to stay in line with standard MMORPG terminology and a series that doesn't even seem to use typical experience levels anymore.