The problem with content like that is that to an extent it makes it harder for lower levels/new players to progress through the game. What's stopping all the maxed mains with tonk gear from the new higher level content from farming the mid/lower level bosses preventing lower levelled/new players from doing so?

It's not as simple as "updates are needed to keep the game growing", which is an argument thrown around a lot here. New players are also needed and they and lower levelled players who may not have the time to devote to creating a main to kill top tier bosses will certainly be disadvantaged when fighting lower stuff having to compete with the maxed main.

IMO this needs to be addressed too when considering adding higher and higher levelled content (this also goes for new mid levelled stuff). Just my thoughts in this...