I completely understand the frustration with the overall cost, time to build, the effect it had on the train, and opportunity cost for what is ultimately pretty short, cloned attraction. Heck, I am still a bit miffed it wasn't open for my trip just a few weeks ago (when it definitely could have been ready for the holiday season last year).
That being said, I think it's always best to realize that thoughts on attractions evolve over the years, especially when we get farther away from the discourse that builds around an attraction from announcement to opening. Right now, everyone's thoughts are inevitably and not incorrectly informed by the discussion surrounding it since the beginning (especially since it took so long to build) but that will change. We'll see if it stands the test of time.