I'd rather not see tables as the solution for making weapons different... My own preference would be to see weapons have either very significant special properties, like giving maces a "push target 1 square" effect on a hit, or to give each weapon its own power list that someone who is proficient with the weapon can make use of.
At the very least, making use of weapon damage type and various special properties can be used to differentiate weapons to various degrees. For example, of the four sword types I listed in my previous post, curve-back swords can do slashing damage, rapiers would do piercing damage, curve-forward swords would do chopping/hacking damage, and broadswords would be versatile at doing more than one kind. Perhaps one would be more accurate, one would deal more damage, and one has an expanded crit range.
Still, weapon choice should be an important choice for any character. I'd like it to be more meaningful than it has been in the past, if possible. I'd just like to get that difference without tables...