I, too, dug Planescape.
I also dug the 1980s run of Amazing and Spectacular Spider-Man comics, with the Roxxon Oil storyline, and Punisher as an actual villain, Silvermane, my favorite forgotten villain the Answer, Cloak & Dagger, Black Cat as Spidey's girlfriend, MJ returning and saying she knew Peter's secret, the Hobgoblin storyline ...
But I just don't think Spider-Man should be required to be the 1980s Spider-Man for the rest of time.
While I certainly empathize with folks really upset about this -- I find elevating Asmodeous says more about the quality of the previous evil gods the game has, rather than being a good idea on its own, even if Paizo was already doing the same thing -- I would rather see Ultimate Planescape in two years, rather than Planescape: The Reunion Special.
I'd like to see the best concepts brought back -- and brought to the fore -- and I'd like the stuff that didn't work, because every setting has them, retooled.
Yes, the best writers and DMs can take the awful stuff and polish it and make it great. And that would be fine if there were only best writers and DMs out there. But there aren't.