Haven't read anything, but I like Perception very much.
I think that it can be distorted, too. A spell which maes a double image of a person (there's a TDE spell doing the same) : Check on Perception, maybe.
Other ways of distortion the perception could be done via poison, alcohol, or by a fanatical point of view (spiritual distortion of Perception ?).

Another thing I intantly thought of while reading "perception" is this : http://en.wikipedia.org/wiki/Highly_sensitive_persons

Besides, I just wondered whether "positive distortion" of Perception would be possible as well ? For example in an fantasy setting, meditation could perhaps give Percetion a bonus ?
Perception ... finding traces in the sand ? Traces of wild animals, ob criminals, too ? Of treasures, buried ?

Regarding the "social skills" : TDE has an "Social Status", abbreviated as "SO", which is a numerical value for checks of the social status ... For example, Peasant speaking to a Lord or a Lady.

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