The 80s aesthetic was really wasted. Yes, there were the clothes and the mall scene and the music, but it's just a backdrop that doesn't really affect anything else. The 60s aesthetic of First Class was much better used and much more integral -- the dated origins of Cerebro, the spy game, the swagger that came with the fashion, sleek decadence. On the contrary, there's so much more to the 80s aesthetic than just being jokes and references for the audience -- First Class seemed to be affectionate of the 60s whereas Apocalypse used the 80s for ridicule. Heck, DOFP did a better job of displaying the 70s (the machismo, the mob, the political climate), and the movie had to split its focus between the 70s and the near-future. And since Apocalypse used the 80s more as a joke or as a backdrop, it wasn't really utilized all that well -- you could set Apocalypse in any other time period (including modern times like most X-films) and nothing important would change.
First Class did a great job of evoking the 60s the same way Mad Men did. I wish Apocalypse evoked the 80s the way Stranger Things did.