Ryan Murphy is a salesman/liar who lives in a world of spin. He’s basically Don Draper.
He’ll say whatever he thinks he needs to say to paint a picture he thinks you’ll accept in order to sell you what he wants you to buy.
That doesn’t mean a word of what he’s saying is true.
For instance—claiming in his latest article they decided to take a new romance for Rachel totally off the table for Season 5 when the other writers themselves have said, plainly and clearly, that the show was setting up a story for her with Sam in 5x06, and when Lea said that decisions about Rachel’s life were made by Ryan.
Also, saying that they are dropping the Lima story out of respect to Cory who was “its cornerstone,” when
A) Ryan moved Finn to the sideline of that story in a huge way in Season 4—Finn was IN NO WAY THE ‘PRISM’ FOR THOSE STORIES—FINN WAS ALMOST TOTALLY ABSENT FROM THEM, and he left Finn virtually NOTHING of value to do in the last year Cory was on Glee.
B) They dropped it because it didn’t work when they tried to make it work this past fall, and it didn’t work due to many factors. No Cory/Finn was one of them, but it was far from the only one, since complaints about that side of the story not working started way back in Season 4, and since it was (and remains) impossible to connect to this show in any meaningful way since they went all happy/shiny/fun-fun-fun/twerk and roar and play with puppets as they assiduously erase all memory of Finn’s existence from the show.