I suggest adding the effect of casting Find Traps to nearby non-hostile PCs. ... or perhaps perception of the trigger areas can be added for nearby non-hostiles directly without them casting it.
Find Traps worked much better with NWN's default party system because other PCs would get to see the trigger areas if I recall correctly. With EfU's eschewing of the Bioware party mechanic the utility of this narrow use-case spell is so small.