I understand there has been mountains written on this already. Perhaps my idea has already been suggested but i thought i would post my alternate rule for iterative attacks (just in case it hasn't been posted and discussed).
BaB progresses as normal, without the iterative attacks added on.
- At +7 BaB and +14 BaB the player gets the option of performing an additional attack if they wish. (that makes two possible attacks at BaB +7 or three at BaB +14)
-If the player wishes to perform this additional attack, they must divide their BaB between the two attacks, or if they wish to do three attacks, they must divide the BaB between the three. Extra modifiers are not lost. Strength and other Modifiers are applied afterwards.
Examples.
-A level 8 fighter could attack once at +8 BaB or attack Twice at +4/+4.
-A level 9 fighter could attack once at +9 BaB, or attack Twice at +5/+4.
-A level 14 fighter could attack once at +14, or twice at +7/+7 or three times at +5/+5/+4.
I'm personally in favor of getting rid of the "full attack" option and just leaving doing extra attacks as a standard action.
(i realize this system would mean TWF would have to be rebuilt, although in my train of thinking TWF and THF and SWF all need to be rebuilt and rebalanced.)
BaB progresses as normal, without the iterative attacks added on.
- At +7 BaB and +14 BaB the player gets the option of performing an additional attack if they wish. (that makes two possible attacks at BaB +7 or three at BaB +14)
-If the player wishes to perform this additional attack, they must divide their BaB between the two attacks, or if they wish to do three attacks, they must divide the BaB between the three. Extra modifiers are not lost. Strength and other Modifiers are applied afterwards.
Examples.
-A level 8 fighter could attack once at +8 BaB or attack Twice at +4/+4.
-A level 9 fighter could attack once at +9 BaB, or attack Twice at +5/+4.
-A level 14 fighter could attack once at +14, or twice at +7/+7 or three times at +5/+5/+4.
I'm personally in favor of getting rid of the "full attack" option and just leaving doing extra attacks as a standard action.

(i realize this system would mean TWF would have to be rebuilt, although in my train of thinking TWF and THF and SWF all need to be rebuilt and rebalanced.)