Destil
Explorer
Strength for bow attacks now, huh? Why don't they just get rid of ability scores all together, since they're pretty much absolutely meaningless outside of class powers. Most classes will have decent NADs thanks to the redundancy, and so basically the only thing they govern is skills.
It would make the classes more flexible. Instead of being a "Tactical warlord" you could have an array of scores that looks like:
Tactical: 18, Inspiring: 13, Resourceful: 16, Bravura: 8, Archery: 10
Melee Training: Charisma just called, it wants its straw-man status back.
Really, with a long bow with something like 100 lbs. of draw, Str makes perfect sense for attacking, heck it was used for damage in earlier editions with bows. Crossbows less so of course.
4E would be surprisingly easy to convert to Tri-Stat system, though. This has struck me at times as well. I think I'd prefer the base 6 scores + a Heroic score for attack and damage and a secondary heroic score for riders, but that's at least an edition away...
Con and Dex are the only scores left with vestigial design elements that affect the rules, skills aside (sometimes Str comes into play on melee basics, too). Once you kill those it makes some sense to do a minor overhaul on everything else...