Modding in bethesda games is mostly due their engine and creation kit. And note that NWN1/2 has a big modding community too.

About D&D, only for me that Vincke saying things about missing, leveling, spell slots, etc remembers me a lot of JAy Wilson with Diablo? Is like "diablo is a amazing game, except on everything" and he said many awful things on GDC, the 13m to 16m in nutshell can be "i found barbarian play boring on D2, so i made every class like barbarian" and on 37:20, he saying that character is disposable,