Guild Wars 2

I understand how the dungeon will automatically choose your difficulty by polling the group and choosing the lowest level as the difficulty.

Could we get a response on if it will be possible to manually change the difficulty as well somehow.

Lets imagine that lvl 10 is the highest beatable difficulty (before 1 gear limitation or another kicks in)

What happens if you ONLY run with the same 5-10 people “for whatever reason”.

You all reach lvl 10… you are now unable to complete lvl 11 because the gear isn’t released yet. Are we able to farm lvl 10 or even a lower difficulty that we choose or would we be expected to find a lower level member randomly to be able to complete the dungeon while waiting for more gear to be released.

What happens when all the gear is out and everyone reaches the highest difficulty… is the dungeon ruined at that point?