Melee combat tweak for reducing die rolls.

[Senevri]

Inspiration struck.

You know, how the BAB row reads like this:
+20/+15/+10/+5,
and it's seen as the iterative bonus thingy.
So, for ease of readability, say it's a/b/c/d.
So, what if:
a is attack bonus as per normal
b is a flat damage bonus to melee and ranged attacs
c is an increase to the critical threat range
and d is an increase to the critical multiplier.

This should work nicely for players. TWF and extra attacks could be handled by flatly multiplying weapon damage on a successful hit.

As a downside, combat gets a bit more random, as multiple rolls tend to average out the hits and misses. However, this should really boost damage at the upper end melee.

Thoughts?

[Maat_Mons]

Would you need to use a full-round action the gain these extra benefits?  Would there exist a way to attack multiple enemies in one round?  This seems to really screw over sneak attack.