they were once a lot more crowded. ok the demiplane of shadow's been upgraded but the quasielemental and paraelemental planes seem cut back to me. There aren't as many mephits either.. makes me sad.. mephits amuse me.
I just don't like what 3.5 has done with the planes, all seems like its written by clueless
imo.
I liked planescape because things were gonna kill you if you even LOOKED at em the right way. It was harsh and violence usually got you killed, scragged or mazed, led to actual roleplaying. Alas, we've lost the general feel. Not enough Celestials, no yugaloths till one of the later
mm (if they appear at all) and very few of the more scary monsters (Sympathetics anyone? ewww).
I hope it isn't rereleased, I like what exists already.. it's perfect.