There's a part of me that wishes they'd jumped further into the future to kick off TFA, with most of the OT characters already being dead and revisited in flashback. Maybe one or two alive but elderly. This would have taken some of the weight off making the OT characters 'fail' and they could have kept at least some of their successes from ROTJ going. A good model for this kind of approach is The Legend of Korra animated series. You get a real sense of the good that the characters from Avatar: The Last Airbender accomplished and it's not undermined even as new challenges to their work arise. And you avoid the problem of needing the OT character's arcs to fit the needs of the ST. Rian Johnson felt like ROTJ's characterization of Luke would have been redundant when placed next to Rey, essentially the same character with the same goals. He might have been right and the setup wasn't his fault.
All this said, I'm not trying to paint a negative picture of TLJ, which I think is an excellent film. I still have mixed feelings about Luke's character arc and I wish the film hadn't been so divisive. There was probably a better way for Lucasfilm to go about the continuation that didn't make a good portion of OT fans feel as though their heroes had been intentionally slighted to make way for the new ones but hindsight's always 20/20.