Poison (the spell) save DC

[Are]

Back in 3.5, I really liked the poison spell, mainly because it had a save DC that scaled with level rather than only being adjusted by the casting ability modifier. It used (10 + 1/2 caster level + WIS) rather than the normal (10 + spell level + casting ability modifier).

I wonder why that was changed for Pathfinder? Was it too good when the effect was changed, or did you simply not want spells that had unusual save DC calculations?

[Carbon D. Metric]

It was probably done so it would bring it in line with other spell effects. Pathfinder did a LOT of consolidation in terms of how things worked.