To start off, due to the settings of the series, many imageries and sounds were already borrowed from existing 80's arts, cultures and clichés.

Then, the endless stream of influences could be a tad too obvious at times - the Terminator, Exorcist, Hellbound, Harry Potter, zombie movies, Twin Peaks, Alien, Koyaanisqatsi (music), Akira, ET, etc. With a better sleight of hand, these influences could be better hidden or transformed so that they're less distracting and everything could be more coherent with a singular theme. Otherwise, it could be perceived as a mélange of the "80s greatest hits", and not something sui generis.