Sorry for derailing your thread, Funeris, I didn't intend to. --But I'll take the fact that you're responding to indicate that you're interested anyways. : )
The issue for me isn't that using Dex instead of Str is overpowered on its own; I just dislike swapping stat mods on a general basis, and do so rarely. A few examples that I have seen and rejected are the feat that allows you to use Wis instead of Dex for bows, and the one that allows you to use wis instead of con for fort saves.
The reason I dislike them is because it promotes extremes in stats; Zen Archery becomes *required* for any archer/priest, and dex can be dropped to 12 at the highest, to give just one example. Finesse fighters give up damage for the benefit of being able to ignore Str. and focus on Dex. Give them nifty abilities like Trip and then base it on Dex, and you go a *long* way towards removing the penalty Finesse fighters pay.
Comments? Are there counterarguments I haven't considered? : )