“[T]hat I have new answers for the central story in the original Torment. So now that I know what can change the nature of a man, I ask: What does one life matter? … and does it matter at all?””
That. That is the missing the target so damn hard it breaks a hole through the wall.
Given that Avellone has gone on record saying he wrote just about everything in PS:T (including the story, all the lore and all the party member and major NPC dialog) I have to question how valid McCombs writing claim is. There is a big difference between “I wrote X” and “I wrote for X”.
As for the Planescape setting. Its the same as D&D, you can tell a fascinating story in the setting or you can tell a terrible story in it. D&D is a setting with space travel, steam punk, time travel, dimensional travel and thats capable of any reality bending you can hand wave with magic. The fact that everyone using it just sticks to elves, dwarfs and orcs is why we’re stuck with all the cliche D&D and D&D like settings. Point being the quality of the setting does not automatically transfer to the writing. In fact I’d say a crap setting encourages more imagination to work with leading to better writing, just look at KOTOR 2