3.5e Comparison[edit source]
Because of the distinct lack of illusions, there is simply no need for disbelief saves. The spells which use saves similar to disbelief (Weird and the like) already have the saves noted in the 3.5e spell descriptions anyway.
That doesn't make any sense. At least not to me.
The spells Shades, Shadow Conjuration and its greater version should all be able to pick any spell from X and lower at the time of casting. Due to the real time combat, it likely this is the reason they were streamlined or made into only 5 choices.