I think it's an overall situation that has a lot of positive and negatives. I think raising his profile and giving black kids a cool main character they could see themselves in standing shoulder to shoulder with Superman and Batman is more important than Hal fans being annoyed that he isn't always the main guy. Even though yes, I am in that group myself.
Really as far as other media is concerned, the 2011 film failure making Hal toxic for live action films is some serious bullshit. But John would be a big asset in that area that they should be using anyway. GL is a property with a built in reason to have two leads, so while John should be featured so should Hal and it wouldn't feel forced.
In an ideal world where DC/WB had their **** together for a shared cinematic universe, I'd have the GL film be a buddy cop film starring Hal and John, with maybe a bit more focus on the former if Sinestro is involved. Then Hal appears in the first JL as a founding member while John is the solo human lead of GL2. and have them swtich places as it goes along: John in JL2, Hal in GL3 and maybe making a guest appearance in a Flash movie, etc.