There was buzz starting a few months ago that the reception to this movie was going to be split. They called it "different" and potentially divisive, but that Lucasfilm loved the direction it was taking, even if it might anger some sub-set of fandom. They knew exactly what was coming.
To that end, I think it makes sense that the announced Rian's trilogy in case of this exact type of backlash. It's harder for Iger to have him fired now as part of a knee jerk reaction(not impossible, just harder).
But for all those gen x'rs like me who love the film and can't wait to see Johnson's trilogy, I hope that works out. I'm honestly more excited now to see what Johnson will do with his films than I am to see episode IX. And far more excited for those than any fan-service nostalgia fest stand-alones they try to throw out there with Solo, Kenobi, or Boba Fett.