[2019] The Experience and "highest player level" affects the sets?

Hello, I have seen that they have fixed in maintenance May 28 2019 that there were people who did not advance in the game experience to the world 5. Does this refer only to that? Or those, we have not completed the secondary missions, (97% in the absence of the bug or not bug "Attack the Historic District") but we are in world 5 and the "highest level of player" is always in 2 while I see that my colleagues are much later in this statistic.

Well what I mean is that if that affects not get more advanced sets, or weapons with certain talents and that my weapon damage is limited to 40,000 or 50,000 while other partners have 100,000 or more damage.

Thanks for any reply.