MarauderX
Explorer
The whole problem is D&D is turn based vs. 'reality' in this case.
I would make 5' steps a move-action as it prevents the super-archers from taking advantage of a full-round action of rapid-fire arrows to a barbarian's face. It doesn't limit the archer to becoming instant dead meat when the melee monster next to her can outrun and outgun her, as she can at least get an attack out without provoking an AoO. Also try out readied actions for the melee guys.
I would make 5' steps a move-action as it prevents the super-archers from taking advantage of a full-round action of rapid-fire arrows to a barbarian's face. It doesn't limit the archer to becoming instant dead meat when the melee monster next to her can outrun and outgun her, as she can at least get an attack out without provoking an AoO. Also try out readied actions for the melee guys.