Let me begin by saying that this is the most accurate representation of the modern Dungeons and Dragons combat system in existence. Neverwinter Nights is great and all, I'm on record as holding that position. But without going into too much detail - trust me, it is not possible to establish in this space the comparative complexity of the systems - allow me to compare Neverwinter's system to Temple's annoying, imitative kid brother. They each made choices about how to manifest Dungeons and Dragons, Bioware made the choices that would be right for most people, and Troika let the source material make the decisions. There's no other way to put it.