Tbh, 1989 doesn't sound like an 80's inspired pop album, but I'm listening to E•MO•TION (Your Type right now) and the album sounds like something you'd hear in the 80's, so that makes me wonder, is E•MO•TION what 1989 should've been?
Mmm... actually no. Taylor obviously set out to have an era with massive worldwide pop appeal and she achieved that because the album was very accessible to people in 2015, crafted alongside the biggest hitmaker of this decade with a very light 80's influence. Emotion, as excellent as it is, would never have achieved that just because of how left field some of the songs are – Warm Blood and LA Hallucinations, namely, aren't songs with mass appeal and are more experimental. I know people troll on here with the answer "it was too complex for the GP to comprehend" but naturally, if the goal is mass consumption, you're gonna want your stuff to be easy to digest. I remember Imogen Heap said that when they were making Clean, she tried to get Taylor to do a key change but Taylor opted against it because she wanted to stick with the tried and true top 40 formula on the album.