Well,
I would love to open a fun discussion about my beloved X-Men movies without having to deal with the usual movie bashing. Hopefully...
Given the fact Marvel and even Hugh Jackman confirmed that "Logan" is an alternate dimension (as well as "Deadpool", "Legion" and "The Gifted") and thus the X-Men movie franchise is a multiverse, not an universe...
So the positive ending of "Days of Future Past" is the definitive happy end of the entire franchise.
Well, it looks like the 2023's "apocalyptic" future of "Days of Future Past" was just a Mad Max-ish world where all continents had been ravaged by the Sentinels, which killed either mutants and humans...? It seems so. Actually, we're never told if that destruction involves the entire planet or just few countries (America, China).
On the other hand, when Wolverine altered the past in 1973, he jump-started a new timeline. In this timeline:
1- En Sabah Nur/Apocalypse was awaken in 1983. Yeah, he shut all nuclear missiles off forever in the space (great thing), but he also managed to destroy some coastlines (San Francisco) using Magneto as "Horseman". Granted, we don't know the real extent of the damage that Magneto caused, but I think people managed to escape from the coastlines in time.
Also, Apocalypse wiped out Cairo from the surface of planet. Totally.
2- We don't know if Jean Grey/Dark Phoenix in the upcoming DP movie will destroy some city or some place; on the other hand, the X-Men will prevent an alien invasion set to conquer our planet.
Also, for 9 years they helped humanity as famous superheroes in the public eye. They saved tons of people and cities in the process, I guess.
In conclusion, has the new timeline been a bless or a curse for human race?
Looking forward your feedback.