Now that Oskar is a black kid (apparently) I guess they gonna throw some political/racial lecture, very common in today american show biss. (Maybe the bullies will taunt him with racist slurs or something).
Also, they described the series as ""elevated"" (which is a label used for the trend of artsy horror films) drama and love letter to the original.. So I expect an "anti-horror" approach (again), very self-serious and probably with very little humor or bizarre scenes. Im totally ok with artsy approach, specially on TV, not so much with yet another "hey, this is drama, not horror" as we already had that with T.Alfredson, and he made it work. The book was a great blend of both, but it was never "ashamed" of being a genre piece, neither is JAL.
One of the main horror parts of the story actually is human Hakan, and he is already dropped, although he can comeback as another character maybe.
And is not a saccarine romance either, Oskar and Eli are not "easy" characters. Unlike other infected I have no problem with them being teen for that matter, aslong theyre the same as in the book, Oskar a naive guy in sexual themes, and life in general with a psycho-killing fantasies with little to no friends and isolated in school, and Eli as this dangerous outcast with a rare "decease" living in poor conditions. Both good at heart, interest in each other company, not sex. Their "romance" has moments of tenderness and sweetness but there's also fun, distrust and anger.
Finally, this is produced by the same folks that tried 3 years ago, they really want to pulled it off it seems, and Showtime ordered a "pilot" sooo this is not an "auteur" mini series with a intented begin and ending, but your typical produced tv show, which means if it work they can go on and add any kind of crap as long it gave them rating.