So... you're demanding clearly defined areas of uncertainty?
Just asking...
I'd like to see Shades re-written to something similar to one of the following options, depending on the designer's intentions:
(1) [Shades is Shadow Conjuration for sorcerer/wizard spells of 8th level or lower] - "This spell functions like
shadow conjuration, except that it duplicates any sorcerer or wizard conjuration (summoning) or conjuration (creation) spell of 8th level or lower. The illusory conjurations created deal four-fifths (80%) damage to nonbelievers, and non-damaging effects are 80% likely to work against nonbelievers."
(2) [Shades is Shadow Conjuration with subschool limitations removed] - "This spell functions like
shadow conjuration, except that it duplicates any sorcerer or wizard conjuration spell of 8th level or lower. Unlike
shadow conjuration,
shades is not limited to the creation and summoning subschools of conjuration. Any sorcerer or wizard conjuration spell of 8th level or lower may be duplicated.
The illusory conjurations created deal four-fifths (80%) damage to nonbelievers, and non-damaging effects are 80% likely to work against nonbelievers."
(3) [Shades duplicates any conjuration of 8th level or lower] - "This spell functions like
shadow conjuration with the following exceptions: the duplicated spells are not limited by subschool, the duplicated spells are not limited to conjuration spells from the sorcerer/wizard spell list and may in fact duplicate ANY conjuration spell, and the level limit for duplicated spells is 8th.
The illusory conjurations created deal four-fifths (80%) damage to nonbelievers, and non-damaging effects are 80% likely to work against nonbelievers."
YMMV, but I believe that if shades were written with one of these options it would be clear what the designer intended.