Not to sound rude, but what green arrow fans? The ones that do exist aren't enough to sustain a tv show when they barely read the comic book.
I'm fine with them taking a different direction with the series. If they want to go with a more realistic direction I'm fine with that. Its worked wonders for batman, no matter how many fans complain.
Don't get me wrong I don't want an absolute realistic approach because that will get boring, but the more you ground it in reality and the less you have magical elements will probably be the way to go with this series.
I find spider-man to be in that realistic approach because they explain things, no matter how flawed, through science.