Sure they are…
It may surprise you but I personally have no problem with the epic arc beeing invaded,my problem is about career agent and school systems beeing blocked by it.
But the arnon epic arc is the first step into the “real” world so yes is my choice…even if it surprises you…
In my eyes you shouldn’t be able to actually DO the lvl1 epic arc in the first month but that would maybe too much for some here…