But you have to realize that for anyone who didn't purely use homebrew, the metaplot was the negative. I only used homebrewed adventures, and having the metaplot was still a negative.
You're basically asking everyone to be OK with having their games disrupted so that you can enjoy the story, which isn't even the point of the game. The point of the game is to be played, not (just) read.
And that came at a loss to most people who played the game. It was, I admit, fun to read (at times), but what it really was was TSR forcing your table to play a very specific way, which isn't really cool--especially if the resolution of that metaplot was bad. For example, the result of the Faction Wars. While I think a lot of people wouldn't mind the factions getting re-done, I don't think I've ever heard any positive comments on the factions that were the result of that adventure. And that means that, if Planescape had continued past that adventure's release, it would have made it seriously, seriously difficult for any setting/lore books to be used by the players