As a writer I know what it takes to create a rootable couple. Klaine definitely has the qualities but somewhere along the way, the show decided to throw one too many nonsensical storylines at them. Blaine cheating on Kurt, a long distance relationship, Adam Lambert. Yet Ryan Murphy and co still wanted us invested in Klaine because well Chris Colfer and Darren Criss are the only two contract gay characters. Which is not a reason to keep a couple together.
This season started with Blaine dating Dave Karofsky, Kurt's former bully. While I adore Max Adler, this isn't OK. There is no way that Kurt should ever forgive his former fiancee for this faux pas. I don't know how many times I have forgiven various characters for cheating, especially my beloved Erica Kane. However what sets them apart from Klaine is that there has always been a line, even if they slept with an enemy there has rarely been a time when one of the 'endgame' partners have dated been truly romantic with an enemy of their soulmate.
Before Klaine shippers start yelling at me that Karofsky and Kurt made up and were friends, I don't want to hear it. Forgiveness is a big key to moving on and letting go of a painful part of your history, however that doesn't make you friends with a person. Can you imagine Revenge pairing Emily Thorne with Victoria Grayson? No, they have moments of friendliness but nothing more than that. The same exists between Karofsky and Kurt, and should have existed with the bully and Blaine.
Do you think Klaine should reunite?