at least Division 1 had more of a variety of things to do even between events. underground is a LOT more fun then Summit IMO, and west side piers have that feel of pop up events if anything. darkzone in Division 1 IMO is much MUCH better then in 2, not in a least due to it being a single larger zone vs bunch of scattered smaller areas. Survival you eventually memorize, but when you are competing against a bunch of other people, it becomes fun again because even with knowing where supplies are, they become more limited and scarce.
right now without new seasons, Division 2 at least for me has less replayability then 1. and I have a LOT of hours in 1. and aint that a sad state of things?
P.S. Division 2 has much more detailed visuals but the drawback of that is that its so busy, visually that it loses its distinctiveness as a result. D1 graphics are simpler. and more focused. so despite being older and less detailed, to me it just looks... better.