(resisting to temptation to talk about music -- but the list of bands is long, that's all)
Agreed. The pathfinder model is D&D -- the witcher is something else. (the stories are also a rip off of the Elric saga but that's another story). Not saying it's a bad game but D&D isn't the witcher -- D&D has it's own history and own feel . And I just prefer D&D to the witcher.
Sure, Zelany was the better writer and Moorcock lists him as an influence. But Moorcock was an ideal factory and lots of the ideas in his books made it into D&D. Early versions of the sourcebook Deities and Demigods provided stats for the major figures in the Elric series. As others have said the Chaos-Law continuum is lifted right from Moorcock. As are the notion of planes of existence. Elemental summoning. Rules for killing gods and demons. The most powerful artifacts in game -- hand and eye of Vecna are taken from the Corum series.
To me "players will disagree" isn't a reason to keep something out of the game. People disagree on things they are passionate about -- if you care enough to argue for your position it shows you care. "tends to start discussions" is another way of saying "immersed" or "engaged"
Sure, alignment can be done badly but it doesn't have to be. Alignment was done well in BG2 and the game wouldn't be the same without the alignment grid -- think of Minsc's comic "make way evil", Mazzy's commitment to honor, Korgan's willingness to murder for coin, Edwin's self serving nature, Haer'Dalis' belief that entropy swallows everything. Alignment provided the pillars of their personality.