I think we need to get the designers to clarify something like this right away.
melee attacks based on strength should be (str vs ac)
melee finesse attacks (dex vs ac)
higher level melee finesse attacks attacking explosed flesh and chinks in the armor (dex vs dex)
touch attacks where armor doesn't matter (dex vs dex)
ranged thrown weapons (str vs ac)
ranged projectile weapons (dex vs ac)
prayer attacks (wis vs con/dex/int/or wis)
spell attacks (int vs con/dex/int/or wis)
melee attacks based on strength should be (str vs ac)
melee finesse attacks (dex vs ac)
higher level melee finesse attacks attacking explosed flesh and chinks in the armor (dex vs dex)
touch attacks where armor doesn't matter (dex vs dex)
ranged thrown weapons (str vs ac)
ranged projectile weapons (dex vs ac)
prayer attacks (wis vs con/dex/int/or wis)
spell attacks (int vs con/dex/int/or wis)