Originally Posted by KillianHawkeye
Non-book system? Are you referring to D&D computer games? Because they almost always bastardize the rules for the sake of balance or game mechanics or <insert excuse here>.
Basically. Pathfinder does the same as well.
That said, it's a strange coincidence that PA is always
limited to a +5 bonus to damage (+10 with 2-handed weapons) instead of how the system works. It leads me to think that the intention of the developers was to limit PA to +5, just like with Combat Expertise (which reminds me: what would have happened if Combat Expertise was similar to PA, with the same bonus if fighting with a weapon in one hand and nothing in the other?). I mean, even Pathfinder went with the idea, and that's a successor system.