Associate
There will be a story but The Division 1 really excelled in multiplayer rather than solo and I would imagine TD2 will be no different. Think of it in Path of Exile or Diablo terms, pretty tiresome and repetitive when playing for an extended length of time alone but way way better with friends
(Can probably include the Borderlands games in that analogy)
Excelled for people who like playing with others, it also excelled playing solo for people who like playing solo. I am pretty much done with D1 and did it all solo, enjoyed every minute of it. Everyone is different, but for those who like to solo all the enjoyment is there.